As far as franchises go.................
ALL tv shows are not going to be canon, great, or in line with what fans want. WE are subject to what the producers, directors, and writers want.......NOT the fans.
Some writers do try and keep in line with canon and what they think fans expect. But........this changes rapidly with fans. Fans are fickle.
What seems to be a great story and great production while being made...........may bomb at the box office........simply because the timing for such an item has passed, or not properly placed in the series of events.
Nemisis was a good movie........it was just out of place in the canon order. Should Nemesis had been made? No. Because it was too far off kilter, and didn't fit with recent events of the lineage. Nemesis is a "one off" movie, but wasn't billed as such. If they had waited another year, I think it would have been fine. But because it was a "one off" from canon.......it should have not been made at that time.
ST orginals had fewer years on TV than NG did. NG earned their right to movies. DS9 was panned by fans, so it never got a movie.
The other ST shows might have done well, but didn't qualify for movies because of the nature of their storylines.
BUT...........I thought Voyager could have had a movie, where Species 8472 attempted to take over the Delta quadrant and the Borg has issue with them trying to take over their territory and war ensued. I think that would have been a great movie production.
But.......with whats going on right now.........we won't know how Paramount is handling this until we see the next ST movie that comes out.
The ST universe has been shifted since the extreme failure of Star Fleet Academy. So, fans won't really know whats going to happen until the next new movie or series comes out.
I don't disagree with much of what you have said.
I will say that The Original Series having fewer years on TV and The Next Generation having more years on TV does not validate or invalidate either for having movies or not.
But The Original Series having fewer series on TV was a big factor in it earning the right to have movies, because there was so much demand and far little supply, except for a two-year Saturday morning animated series and years of reruns. And the extreme hunger for new installments of The Original Series paved the way for the movies.
If it weren't for the original cast Star Trek movies, there wouldn't even be a Star Trek: The Next Generation or anything else that followed. Even the whole concept of the Enterprise-D was set up in Star Trek IV: The Voyage Home.
The Next Generation did not earn their movies. The movies were handed to them on a silver platter by birthright, and they trashed their privilege, culminating with the flop of Nemesis.
I'm not debating with you whether Nemesis is a good movie or not, and you're entirely entitled to like it as much as you please.
But that doesn't change the fact that it was a huge flop.
Heck, even Denise Crosby was a much bigger movie star than the entire cast of Star Trek: The Next Generation in 1998.
For that matter, Denise Crosby was a much bigger movie star in 1998 than the entire cast of Star Trek: The Next Generation in any year.
My sole and original point is that everything that is happening with the current state of the Star Trek franchise is because Paramount rushed the original cast off the big screen too early and rushed The Next Generation onto the big screen too soon.
And regardless of the varying runs of the various shows, one thing is certain.
The most Star Trek movies were made by the original cast. They still hold the record for most Star Trek movies. The Next Generation fizzled out after only four movies -- and really three on their own -- and the reboot cast made even fewer movies, just three, so they're kind of tied with the Next Generation.
And The Original Series had its grand finale on the big screen.
The Next Generation left the big screen with barely a small whimper, and they ended up back on television decades later, on only the last season of Star Trek: Picard.