One positive side to reboots: they tend to call attention back to the previous versions, increasing the the odds that modern audiences might check them out. Sure, a certain percentage of the audience is only going to be interested in the hot, new version and have no interest in the older versions, but the latest version may also pique the curiosity of new viewers, who may or may not be inspired to revisit the older material, to varying degrees.
And, again, this isn't a binary, either/or thing. It's a spectrum with extremes at both ends. Some may want to delve deeply, going all the way back to TOS, while others may simply choose to sample one or all of the latter-day series. And that's all good.
It's funny. I occasionally see people pronouncing the new movies a failure because they're not driving enough people to go back and watch the "real" STAR TREK, which strikes me as missing the point. Yes, ideally, it would great if the new stuff increased awareness of the earlier material, but that's not the main goal nor the standard by which the reboot should be judged. The idea is to move the franchise forward and capture today's audience, not to create more VOYAGER fans or whatever.
I wonder if some people are worried that the reboots will "take over" the franchise to some extent, so that this becomes the default tone for all future
Star Trek projects. That has happened before. Case in point in the
Teenage Mutant Ninja Turtles franchise. Although the source material (which would ostensibly the "purest" form of the franchise) was the Mirage comics, it's the '80s cartoon (which, for good or bad, was a very unfaithful adaptation) that's defined the TMNT franchise ever since. Name a detail of about TMNT and it's probably not from the original comics, [in Cajun accent] I'll guarantee.
Shredder being the Turtles recurring blood enemy, the mutagen rules, Splinter being a human mutated into a rat, April being a reporter, Dimension X, Krang (or the Kraang, if you're a Nick TMNT fan), Bebop and Rocksteady, even the Turtles' bandana colors and love of pizza are not from the comics and were invented for the first cartoon. (Now, I myself don't like the tone of the original comics, since the 2012 TV show is my gateway to the franchise, but the point that the reboots completely overwrote the original iteration of the franchise to the extent that version that try to go back to the roots still use elements from the '80s still stands.)
For
Star Trek, regardless of continuity errors in the reboot, I'm not a big of this style of
Star Trek and would like some future TV shows or movies more in tone with the originals (regardless of internal continuity). But, if the reboot creates the idea in people's minds that this's the "only" way to do
Star Trek (the way the '80s TMNT cartoon is always the basis for all future projects in its franchise), then I'm going to be depressed, since something I've always been a big fan of no longer has a place for me. It's fine if there's stuff that appeals to other people, but the rest of us would like to be able to have new things, too.
And at one time or another, most of what we now consider the "real" Star Trek -- the third season of TOS, the animated series, the movies, TNG, DS9, VGR, ENT -- was all dismissed as "not real" Star Trek by some contingent of fandom. Because there are always, always people who preemptively reject whatever is new and different from what they're used to. But that point of view never really lasts. There are always going to be people whose first exposure to ST is going to be the newest thing, and that will be the "real" ST to them. And they're no more wrong to think that than the people whose first exposure was to TOS or TNG or whatever.
That's a very good point to remember (and one that's hard for those of us who the new stuff has changes enough that the stuff that made us fans in the first place is no longer there).
Sad to imagine a "personal canon" that includes "The Omega Glory" but not
The Wrath of Khan . . ..
You never know what parts of something matter to some people and what parts ruin it for them. I'm a Spider-Man fan, but I've found that all the new comics and most of the new media in general have really stripped everything I liked about the character (excusing that
Renew Your Vows entry in the
Secret Wars comics and the
Civil War movie), so, for me, I find it the most rewarding to look for
Spider-Man stuff that fits with the version that I like (stuff that's like the original movies and original
Ultimate comics, in this case), and leave the rest be.