Echoing other comments, but to put it in the language of the UI in other products: scrubby zoom in the comp/footage/layer windows. I go and work on something in Ps or Ai where I can easily zoom in and out with mouse/tablet input, and immediately I come back and have to bang my head on the stepwise zoom in Ae.
Jabez Micheal commented
hi can we pwease have scrubby zoom for after effects also? so that its easier to work between aftereffects and illustrator?