Unless you can back that up, "Majority" is something you're making up. It's a guess.

It also doesn't matter whether it's true if the majority or not- "Instant transitions are only good in theory" is not a true statement. Instant transitions are good in practice for many people and that has been true for decades.

I see Kiro's guess and raise you an anecdote. I just turned animations off on my Android device, and instantly it feels faster and more responsive.

Maybe software programs got faster with our faster CPUs but all the animations just made everything feel slow.

Most people with that opinion keep using apps and devices with animations, but thinking it would be better without them. Very few actually torture themselves like that in practice.