I've been trying to put my finger on when Trek fans became so obsessive over the consistency of the Star Trek canon/continuity. The time I started to notice this happening was probably when ENTERPRISE was announced as a prequel and then nearly every Star Trek production being a prequel after that.
Fans have always been debating over continuity. If you look at the old
Best of Trek collections of fanzine articles, there was a whole series of "Star Trek Mysteries -- Solved!" columns where the columnist tried to answer reader questions about continuity problems and contradictions in TOS. And there have always been fans who refused to accept any new incarnation of Trek as the same reality as the old, from the animated series to the original movies to TNG and beyond. TOS purists
hated TNG for years and it took a long time for them to accept it.
However, fandom's obsession with the specific word "canon," and the myths that have arisen around the importance of that label, date primarily from a memo that Gene Roddenberry and his assistant Richard Arnold issued in 1989, claiming that they no longer considered the animated series canonical. This memo had no actual binding power on the shows themselves; Roddenberry had been eased back to a ceremonial role by that point, and the shows actually did reference TAS during the period the "ban" on TAS was supposedly in effect. The only actual power of the memo was over the tie-in books and comics, which Arnold was in charge of approving at the time.
But the memo created a false impression in fans' minds that "canon" was a stamp of approval or legitimacy handed down from on high, rather than just a nickname for describing the original body of works as distinct from outside emulations like fan fiction and licensed tie-ins. And it created the myth that "canon" was a status that could be assigned or revoked, and that it was defined by what it excluded. So it created an artificial fixation with the label itself, a misinterpretation of the label as something that
created a work's status by being applied to it, rather than merely describing what it already was.
So while fans had always argued about continuity and what to include, it was around 1989 and after that those arguments started to narrow in on being over the word "canon" itself, often to the point that parsing the usage of the word overwhelmed any meaningful discussion of the underlying concepts it was meant to describe.
It didn't help that Lucasfilm Licensing started applying the label "canon" to its
Star Wars tie-ins -- wrongly, as it turned out, since George Lucas never considered the tie-ins canonical and freely ignored them when making the prequels. What LFL really meant was that the books and comics were all consistent with each other, which is not really the same thing as canon, so their use of that term confused the issue even further, as well as perpetuating the myth that canon was an officially assigned seal of approval rather than simply what something intrinsically was by its nature.
If we could forget about the label "canon" and get back to just talking about continuity, it would eliminate a lot of wasted noise and time and confusion and myth. But it wouldn't end the arguments altogether.
Not really until "Discovery" People have always been interested in canon and continuity but for the most part all the Berman shows tend to connect very well, including Enterprise and TOS took place in the 60's and also like 80 years before those other shows and like 50 years before TOS in regards to Enterprise so it's easy to see it's unique look and style as being apart and very different from the rest..
Holy crap, you couldn't be more wrong. The arguments about
Enterprise during its run were
exactly like the arguments about
Discovery today, often beat-for-beat. And the same thing happened with every previous series too -- again, people today have no idea how much fandom hated the idea of a Trek show about some bald French guy in the 24th century instead of Kirk and Spock.
Back then, I even predicted that the arguments about ENT being an alternate universe or an unforgivable corruption would eventually fade and that the next generation of fans 10-20 years later would regurgitate identical arguments about the how next new incarnation of Trek was incompatible with the "true" canon of TOS through ENT. And as it turned out, I was absolutely right. It's a cycle that repeats every single time a new Trek incarnation comes along.
The Kelvinverrse has the alternate timeline to sort of insulate it
Yet nonetheless was damned with a savagery every bit as fierce as that leveled against ENT before it and DSC after it.
but Discovery tried the new look that TNG did when it followed TOS only they didn't give enough of a time gap because people have a harder time seeing that amount of change happening in 10 years as opposed to 80 years.
Actually it was ST:TMP, set only a few years after TOS, that first introduced a complete, radical redesign of everything in the Trek universe. TNG's look was largely a recycling of TMP's look, in that it literally reused the sets built for TMP, as well as reusing starship miniatures built by ILM for the sequel movies in the same design style as TMP. So if anything, the implausible thing was that Starfleet ships and tech looked so much the
same 80 years after the movies, despite being completely and radically redesigned in just the 2.5 - 3 in-story years between TAS and TMP.
They could have saved them lots of outraged fan complaining at least on this issue if they just called it a prequel in the Kelvinverse or another alternate universe but they wanted to say Prime to lure in old school fans while doing enough changes to bring in new fans.
I doubt they could've put it in the Kelvinverse, because Bad Robot and Paramount are not involved with the production of
Discovery, so there would be permission and royalty issues to work out. Since CBS has full, sole ownership of the Prime timeline, it makes business sense for a CBS-made show to remain in Prime.