Expose (or whatever the hell it's called now) is significantly faster on my 2015 5K iMac, the animation used to lag with as little as 6 windows on my workspace,

Expose (or whatever the hell it's called now) is significantly faster on my 2015 5K iMac, the animation used to lag with as little as 6 windows on my workspace, I've seen it handle around 24 now without dropping frames. The upgrade to Metal 2 for WindowServer is a pretty nice performance boost.