As with everything produced and brought to market by a (huge) company: the will ruin their product in the end (and might have done so already).
But that’s not so terrible. 5e is pretty much an open game with a free license and there is a bunch of Indie RPGs out there and people are still playing (clones of) older editions of DND (I woupd advise anyone who hasn’t heard about that to find out about it).
My only concern really is their IP. I love the Realms, Eberron, etc. They’ve been ruining pretty much everything lately I mean Just look at spelljammer.
Oh yeah, I understand, that could be problem.
But they didn’t produce a lot of content for Eberron and Spelljammer for quiet some time, did they? One could say, that that part of their IP has been shitty for some time already.
I just hope the hobby as whole grows and at the same time more people learn about other ttrpg stuff out there. That new Eberrons and new Spelljammers come to be.