Agree the Classic Mac animations were really good and didn’t really slow you down.

I’d compare that with the too slow IMHO animation when an app goes full screen on macOS.

Or look at Split View, it was clearly designed for ios touch and then later shoehorned into macOS.

My pet theory is that they left out keyboard ahortcuts for Split View because moving windows about with the keyboard would be too fast and highlight how slow the animations are.

Using a touch pad or mouse is slow anyway so you notice less.