Audiences (and content) have evolved to the point where 90+ episodes of TV is too much of an investment for them. It used to be that 22 episodes was the standard length for a TV season. Now more and more shows, even on network TV, are getting cut to 13, and even 8-10 episodes. The only shows hitting the 22 episode numbers are all the police procedurals and medical dramas, and maybe the odd sitcom or cartoon.
Even if a show hits 90+ episodes, it'll probably take them nearly 10 years to do so as opposed to the 4-5 years it used to, and since those shows are likely to go on to streaming services than air in syndication on cable, that many episodes is actually diminishing returns.
I think the big push studios were making to get shows enough episodes for syndication in the late 2000s/early 2010s was the death of that model. All those Debmar-Mercury 10/90 sitcoms failed, and the ones that actually got to 100 episodes just got burned off and never aired on TV again. Sony tried hard to cut deals with networks to get enough episodes for syndication. Community bombed when it aired in syndication and on Comedy Central (but did very well on Netflix). Til Death was a show that was notorious for getting low ratings, but it kept getting renewed just so it could get the minimum number of episodes for syndication, only for it to still get low ratings and it hasn't aired on TV since.
There are only a few shows that can actually do well in syndication anymore, and there the same ones that have been airing for 20+ years: Fresh Prince, Star Trek The Next Generation, Friends, Law & Order, CSI. And throw in Big Bang Theory and Modern Family for more recent shows.