The third: there’s stutter all over the place, jank in pretty much every animation. E.g. before leaving this comment I just swiped between two app screens and got a ~10 frame hiccough in the middle of the animation. The jank is pervasive.
A 10-frame hiccup is actually more of a hang (a single >50ms freeze) than consistent frame dropping (i.e. scrolling at 30fps)
but I agree, the hangs in the latest operating systems are brutal. Feels a little half-baked. macOS Tahoe is much worse than Sequoia on this by far. I’m hoping that the later releases (26.1, etc) make the situation better.
