I’m not a UI/UX expert but here’s my 2¢ from limited work in this area. It depends on the type of animation and the platform. A fade in that’s 250 or even 500ms

I’m not a UI/UX expert but here’s my 2¢ from limited work in this area. It depends on the type of animation and the platform. A fade in that’s 250 or even 500ms can be a nice effect on mobile when it’s not blocking other interactions. 100ms is too short to be noticeable for many things and depending on the screen refresh rate and distance for motion animations you will end up with large jumps.