Interesting that this was the UI aspect that was chosen for a video. In my experience, Yosemite performed very poorly when clicking on a folder from the dock (v

Interesting that this was the UI aspect that was chosen for a video. In my experience, Yosemite performed very poorly when clicking on a folder from the dock (very low framerate). My problems were worse than bad UI though, I was losing data. Yosemite frequently (every other day) crashed hard-core and the only option was to power cycle. Though I save frequently, sometimes I just hadn't hit Cmd+S yet, and in some running processes, it corrupted data. (On a Late 2013 MBP.) Reverting to Mavericks made everything silky smooth again. Not a single crash or performance hiccup. I think I'll stay here for a while.