Yeah . . . I'm really confused by when people say "So, Beholders and Mind Flayers aren't evil anymore!?!"
Like . . . no. Have you guys even read the errata and the context for it? What they got rid of was redundant description text for these monsters. What the sections they got rid of said was already stated in other parts of the same chapters.
And if Beholders and Mind Flayers suddenly do become not-always-evil . . . so what? Large Luigi from Spelljammer wasn't evil (at least, he was able to restrain his beholder instincts enough to be a
freaking bartender). Gnome Ceremorphs are already stated to be able to be any alignment. Just because not all of them are evil doesn't mean that you can't still use them as villains or enemies in your games. Not all humans are evil, but they're a super common enemy to face in most D&D adventures (as bandits, evil mages, evil nobles, etc).
Wherever they want it to.
Yeah. As John Oliver put it, the answer to "when does it stop!?!" is always "freaking somewhere!"
It stops somewhere. It won't continue on forever. It will continue (I'd be surprised if Giants, for example, were listed as any specific alignment in the revised Monster Manual that's coming out in 2024), but it won't continue on forever.
I really hope we see some playable gnolls in an official product at some point. It's silly to draw a hard line there, when at least two previous editions have included good and neutral gnolls before 5e.
Ditto. Eberron and Exandria in 5e are already stated to have non-evil gnolls and hint at them being playable . . . but there's no official playable Gnoll race Explorer's Guide to Wildemount or Eberron: Rising from the Last War. It's really disappointing that we don't have one yet, IMO.