Here's the issue, I don't think there's anything definitive to declare
Discovery and SNW are off in their own quantum reality. But that scene from
Lower Decks DOES open up the possibility, especially since Mike McMahan did NOT shut down that speculation and was quite clear in leaving it open to the interpretation of the fans.
Also:
- DSC's version of the Klingons are not seen in any other version of Trek beyond Lower Decks, where they're implied to be from different quantum reality.
- A spore drive that hasn't been referenced in any other Trek that doesn't have any direct connection to DSC.
- SNW arguably acknowledges that it exists in an altered timeline with "Tomorrow, Tomorrow, Tomorrow" that is NOT the Prime Timeline.
- SNW has a version of the Gorn that in no way tracks with TOS.
- The crossover between Lower Decks and SNW can be explained as the portal allowing travel between both universes and time.
- The fact that certain events are referenced in Discovery is not proof that it exists in the Prime Timeline. Arguably, it exists in a timeline that's similar but not exactly the same.
- Also, the dialogue in Lower Decks about how the fissure works in "The New Next Generation" states the Discovery Klingons that appear in the episode are from a different quantum reality.
Finally, at worst, no one is saying that
Discovery or
Strange New Worlds would no longer be
Star Trek. All people are saying is that it would exist in its own continuity, where they can do their own thing. And if people wanted to continue
Star Trek in the 25th century, they wouldn't be tied down to the "The Burn" or any of the choices made by
Discovery or
Starfleet Academy for the 32nd century.
Moreover, beyond all of the canon/continuity arguments, just leave those to the side for a moment. I think it says a lot that the elements of
Discovery's first season are now seen as so ridiculous that they're literally jokes in other parts of the franchise. I mean what are people here so vociferously protecting? A version of the Klingons and
Star Trek that were so universally hated that the people in charge went into instant backtrack mode because of the backlash? That's what you're defending to stay in the Prime Timeline?