I am posting this from Kubuntu 8.04.2. The last version with KDE3. It is insane how much faster it is than anything KDE4. I click, stuff launches immediately. I resize a window - any window - and it resizes smoothly and instantly. The cursor never lags at all, and the desktop starts in 10 seconds, not 30. It makes Windows XP look right sluggish. Usability is also better than KDE4 IMO; e.g. you don't have to unlock panels and whatnot to create launchers on them. I don't understand why this desktop environment was thrown out. If I were a Windows user, migrating to Linux for the first time, I think I'd find it very intuitive and snappy; whereas KDE4 is... not usually unintuitive, but very far from being snappy. Year of the Linux Desktop, indeed. I'll see later if I can compile a custom 3.x series kernel for this old Kubuntu version. Userspace security is going to be regrettably bad no matter what though, with no more updates.