There's some ambivalence here for me.
Adaptation, evolution, and growth are inevitable and generally positive things. On board in principle.
But, these are frequently employed as excuses to do things that aren't so much better as they are just different. D&D attracts creative people who want to put their own stamp on things, and change doesn't necessarily mean improvement. It can just mean someone wanted to shake things up or had some personal pet idea they liked and decided that the rest of us needed to indulge them.
And then there's the complicating factor of the diversity in D&D's player base, where a change that favors one subsection of the community might work against another subsection of the community and end up narrowing the appeal of the game in one way or another. We've lived through enough edition wars to know that different audiences want different things from this game.
There's also the complicating factor of what WotC does with the official version of the game vs. what creative folks can do with offshoot versions of the game. Some of the things that people are quick to jettison from D&D are kind of brand markers and hobby tropes that help solidify a community feeling among users, even if they don't serve some perfect hypothetical idea of what the true game should be.
And, D&D changes more often than most games! Connect Four is about as old as D&D, and has not had to change very much to still be a fun game! Games get to be old and set in their ways. Having D&D around today doesn't mean Kriegspiel has to change. Both things can exist.
When official D&D wants to change in a big way, it does need to sell me on that change. And "because a designer though it would be a good idea," or "because D&D works better (for me) this way!" or "this is just an OBVIOUS (to me) improvement!" or "because it HAS to change with the times!" aren't really compelling for me on their own.
But at the same time, change is going to happen, and that's generally OK, and can be quite good. Expanding to new audiences is grand. But we can't just assume change yields improvement.