I've had many situations where animate has been limited due to only being able to infinitely loop the animation whereas it resets at the end of the loop. I think it could benefit from having a loop -2 and -3, -2 being rewind animation once and -3 being rewind animation, then re-run the animation, and continue in that pattern until interrupted.

In my opinion the animate proc is most limited by the fact that atoms don't have 'animation sets'. A set of multiple individual animate parameters that has a pattern order. This would allow for complex animation loops.

For example: animate_set = list(a ball floats up, disappears. , the ball slowly fades in. , the ball's color changes white while floating back down to its original position)

this animation set, repeating infinitely, is currently impossible using loop=-1 on a single atom