Channels aren't visually changed by playing back an animation so there is no need to do this. As rendering channels is using a lot of logic (filtering animation data, converting fcurves to samples etc) it has an noticeable overhead. This change has no functional limitation. Users are still able to do everything during animation playback. There are other mechanisms in place that take care of that. Spring 02_020_A.anim.blend went from 11.8 to 12.0 on a Ryzen 1700. I didn't test with scenes but it should be more noticeable with more complex scenes. Reviewed By: Brecht van Lommel Differential Revision: https://developer.blender.org/D8073