And I don't want or need, for my own use, some Accessibility-defined systemwide setting that tells all apps to try not having motion. It sounds nice to have…should I ever need that. But at least from Apple's description it seems invasive and like it might possibly disable untold things that I don't want to mess with.

I want to speed up or eliminate certain decorative things, like this particular animation. Since there's no obvious no-side-effects way, I just grumble and occasionally rediscover UI performance when I use some other system.