Greetings:
Since the very beginning of Star Trek (Stardate: whatever/Earth date: 1966, September 8), the back then first series were fairly consequent regarding tech, species, in general, simply said.
The last episode (Stardate: whatever/Earth date 1969, June 3), not much had changed in these runs, and movies as well followed a fairly strict code when it came to cannon.
Fast forward: Star Trek The Next Generation.
It is Septemer 28, 1987.
Captain Kirk and his fellow "barbaric" friends are too old to fly, and were replaced, as logic would enforce (we can't have a captain which can barely stand up by himself at the helm, now can we???) by a ounger, much more vital crew.
The new Enterprise as well has had, logically: as time evolves so does (technological) evolution, quite a few new tricks up it's sleeve, although, it was very much still the NCC-1701, a disk on a pole mounted to the body/warp section, which had two tilted poles on the rear holding the nacelles.
Sure, the NCC-1701 D as well as the NCC-1701 E were more streamlined, aesthetically pleasing, but still very much the original NCC-1701 (not the technologies, naturally!).
And things were still fairly well cannon, not much was called back or added (well there was the new enemies, races and spaces, of course!), all still went fairly straight-forward.
And I ignore the Battle of Wolf 359, this was a BAD episode, entirely incorrect, but well...
The exception on the rule, I guess.
Fast forward once more: Voyager.
Januari 16, 1995, Kate Mulgrew becomes the new captain in the series, no longer using the now well known Enterprise ship type Constitution Class, but the Voyager, an Interprid Class, as Captain Katherine Janeway.
Now, I have to say, the ship was a surprise, but a welcome one.
And unfortunately, there all pleasantness ended for me.
Having seen Captain Jean Luc Picard, Captain Janeway simply did not reach this level of personality.
The other crew members as well underperformed compared to the 'Picard Crew', and from early on, base values were changed in near every episode.
Conflicting data, much being this data about their Borg nemesis, but surely not ending there, I began to get lost in the series, and simply quit seeing this monstrosity called Voyager.
I need to say, I am autistic (Aspergers) with ADHD, I have need for set cannon, and I abhor changes like being thrown around in Voyager.
Well yes, the previous 2 series had a few alterations as well, but minor, not that disturbing, and these were implemented brilliantly, hardly noticable, well explained.
Not so in the latter series, where everyrthing more and more began to look like a joke more than a series.
And take Discovery: what on Earth do I need to make of it?
Spore Drive, nice looking Klingons (compared to the well known ones), marvelous ships, ...
Is this still cannon?
If so, then why has there never been reference ANYWHERE?
I have the strong feeling this is more like a mirror version Star Trek, a thing on it's own.
"What the hell was that beast???"
Oh come on...
It lives on Earth, you did not recognize it???
Tres bizarre, this Discovery....