From my own experience... I'm a "second-generation" Star Trek fan, by which I mean I grew up with TNG/Berman Trek. To me, TOS (the TV series, not the movies) already used to be that terrible campy old crap, and it was/is for quite a few others my age. I later learned to love it, but I still see many of my age who are fans of TNG but think TOS is unwatchable shit.
At the same time, I see many young people online, often half my age (I'm 40), who fell in love with TOS. One example would be the duo of the "I Quit Star Trek" podcast (if that name seems odd in this context: they love Star Trek, they just make fun of terrible episodes). And I guess if someone's a "third-generation" fan--by which I mean having grown up with Abrams/Kurtzman Trek--this content may be a primer that makes them want to check out that original show. Indeed I think TOS is often even more relevant to some of the present-day content than it was to Berman Trek, especially Disco S2 and, obviously, SNW.
So I don't think TOS will lose its status compared to earlier, because the detraction was there in the 90s already. It looks dated now, but it also did in the 90s, to almost the same extent imo. Also, retro is more in vogue than it was back then. It will continue to find new fans, not least because the Shatner-Nimoy-Kelley trio is so amazing and enjoyable, it has no match in any other show.