Please stop everything that you're doing with the development of new bells and whistles and doodads and put all your resources and firepower into resolving the years-old issue of the Slow and Laggy Interface in After Effects. Seriously. It's been YEARS. I kept thinking, "ah, they'll fix it soon.." and hope for the best and I end up feeling like Charlie Brown trying to kick the football every time a new update for After Effects comes out. "Maybe they fixed it!" And it's still not fixed.
When I contact Support I'm told, "the issue that you are facing is a known issue and the same has been highlighted to the designated team who are working on getting the issue fixed in the future releases," but it has yet to be fixed.
Old After Effects was FASTER on OLDER laptops - I have been on modern workstation-build DESKTOPS that are slower in response. Makes me not want to work in After Effects. I feel bad for those starting out in motion graphics in 2020 and this is what they are introduced to.
SpaceX put two astronauts on the space station. Surely we can get a butter smooth interface in After Effects.
* When we've investigated keyframe or UI lagging, the primary cause has been found to be 3rd-party script panels or plugins that are also trying to interact with the UI causing these delays. From the twitter thread I can only see a few layers but not a full view of AE to know if this is a default install or if there are other things in play here. If you've got projects that demonstrate the UI lagging, please pass them along and we'll happily look at them.