Maybe you dislike them, but that does not make for a fact.
Instant transitions are something I strongly prefer and use in practice. There's no question, I don't want my operating system slowing itself down to a factor (literally) of 1000x, pointlessly fading and jiggling and sliding and bouncing and wiggling. And, as this article points out, animations in operating systems often make a visually illegible mess in the meanwhile.
Animations might be a good idea in theory, but it doesn't seem like anyone has figured out how to do them right.
Indeed: one of the first things I do on a new android phone is activate developer mode specifically so that I can set the animation timescale to 0×.
Which the majority of people think is a horrible experience. There's even a sibling comment in this thread pointing that out: https://news.ycombinator.com/item?id=48518721
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.