So-long Photoshop CS4
I haven’t used Photoshop CS4 for a month or so now.
In spite of some issues with CS5 (some of which I know Adobe is fixing), my work frequently involves multi-gigabyte files, so CS5 offers a huge performance advantage, once warmed up, since it can use as much memory as it needs. Plugins are still an issue for some users, but not for me.