If it was up to me, there were no transitions. I am happy I can disable them on Android... Everything that does or manipulates animation is terrible. Scroll hijackers, image carousels, icon transitions, they are all wasting cpu cycles to please UX/designers!
I'm glad there's at least one other person vocal about doing this. I use a several-year-old Android phone, and when anyone new sees me use it, the first thing they ask is what phone it is and if I just bought it.
Those animations were for a time and place where phone processors were genuinely slow. That time and place is nearly a decade ago, and most of the world is stuck with lower productivity due to this vestigial cruft.
Think of all of those teens that can type a billion letters a minute without batting an eye, and yet have to unwittingly endure all of these silly transitions...
But of course, it breaks a whole bunch of poorly tested apps, even mainstream ones like Uber and Lyft.