> What I dislike the most on modern UI, and maybe absolutely hate, are all those super slow animations.

I get it, and I agree. But what I personally hate the most on modern UIs is hiding things. Why aren't my scroll bars visible when I'm not interacting with them (and even when visible, are ridiculously small and low-contrast)? Why does IntelliJ hide the buttons for interacting with tool windows until I mouse over where they should be? Why does MacOS hide my application launcher bar by default? Stop hiding things!