Yes Thaco the clown was everything wrong with the attitude of the current D&D Stewards. You don't have to understand D&D Conservatives. Planescape, Ravenloft, and Spelljammer are worst than the previous iterations. You just (Apparently) weren't around for the better version. You don't need to understand. You just have to deal with the consumer feedback the same how we have to deal with what we consider an awful art direction.
For me it depends. Darksun I want a faithful adaption of the 1991 boxed set. Sone changes are needed of course scapel though not chainsaw. Mostly I just need defiling mechanics maybe psionics.
Not best example. Doesn't bother me if the make the most over the top variat of Book of 9 Swords or whatever. They can do whatever they like with a new setting. I may or may not buy it but they can surprise me eg Eberron. Not my cup of tea normally but the quality was good enough to change my mind.
A modern setting for modern audiences go for it. But yes this means there's limits to what they can do with the setting and that's fine by me.
I know people weren't enthused about Planescape, Dragonlance or Spelljammer as they butchered them. Their cultural impact will be 0 no one will care to much now or a few years they won't have much appeal imho.
I didn't care to much about the 2E versions tbf. Their existence doesn't bother me. 2E Darksun isn't that easy to run either tbh.
As per usual the internet weaponizes things. Diversity to me means variety. That means old school Darksun can exist beside Radiant Citadel. For some it means making Darksun like new worlds and big surprise it doesn't appeal to old fans or the new. Old fans hate the changes new fans have seen it all before there not much that's distinct about it eg Spelljammer. Old school Spelljammer was bizarre and had ship to ship combat front and center.
You can't reconcile some things. Simple-complex, gritty and the hippy. Waste of time trying.
Doesn't bother me if they cater to someone else's tastes but if you're trying to remove what I like that's a problem. If push comes to shove I'm picking me over you if it's a zero sum game.
Basically I dont buy it. If enough people agree with you WotC will learn the hard way. I'm not to worried about D&D popularity or fate anymore. I bought 5.5 if it tanks it doesn't bother me or of it blows up same thing. 4E taught me I don't need to run the current edition to have fun I can opt out.
It's really only an issue if you can't find players. If you can't there's a reason for that may be location could also be not enough people agree with you.
I've played D&D in a town of 12k and small city of 130k it's easy to find players as long as you leave your house. Also means you might have to run your own game or do the organizing. Used to do that in MtG so easy enough.