E17 conforms well enough to the freedesktop.org standards. Even though it's not really a standards body, freedesktop.org is readily used by modern window managers, and is becoming a defacto standard. E17 does still store its config in the $HOME/.e directory though, instead of $HOME/.config/e . Can't wait until all unix utils use the .config directory, clearing out the dotfile clutter in the home dir.
Games run perfectly well under E17. I have dozens of games, bought via Humble Bundle, and every one I've tried has worked fine with E17 (barring game bugs, of course). I had a problem once, with keyboard only games not getting focus when they run fullscreen. It's working fine now.
I use E17 on my work computer. Have done so for years. Any instability in my working environment has generally come from me, not the window manager. I think it's only ever crashed once in that time, and even then, I could press F1 to recover (as instructed by the crash dialog), and the window manager restarted itself with all windows intact.
The parent post was trolling. Probably best not to feed the troll.