v0n said:
"You can have blackbox, fluxbox and it runs fast" is not really a good case. Windows desktop is bloated and fast, linux desktop can be either minimalistic and fast or fully featured and much slower.
Haha, are you trying to be funny? Have you ever actually used fluxbox or even better openbox? They have about a million more features and useful tricks than windows/sawfish/metacity/compix/kde's window manager.
I would say windows managers are one of the areas where linux is way ahead of windows (don't know about OSX having never used it, but I assume that some of the ideas come from there).
Here's an interesting fact for you. Once I have booted to my desktop, conky reports (i have buffers removed from the calc) my total memory usage to be ~70mb. Thats with services like mpd, slim, mpdscribble, as well as my desktop. I've got a whole 1Gb of ram to play with, so I don't care how much it uses, I have a 2.2Ghz Athlon 64, so I dont really care if it is resource hungry. I have tried many different desktops. Gnome, KDE, XFCE, Windows, Flux, FVWM, Pekwm. But I always go back to my trusty combination of openbox, pypanel, conky. Not because I'm a stikler for resources, but because it is amazingly fast, very powerful, and allows me to work in a fast natural way.
If you have a browser, and email client, a couple of filemanager windows, a couple of text editor windows, maybe a console, perhaps gaim, gmpc, maybe a dvi viewer, the gimp, maybe a specialist app like maple. Now try that in windows. Tell me how fast it runs, tell me how easy it is to find what you want, switch windows, and work efficiently. Then do the same in openbox. Thats a real example of what my desktop is like when I'm creating a lab report.
To sum up, I really think above example demonstrates, that lightweight window managers such as openbox, are more powerful and produce a better desktop environment that most "bloated" desktops.