Regarding activity on forums. I think MorphOS is just straight forward and works very stable on all supported plattforms. I know dozens of MorphOS Users who use their machines everyday without participating in any morphos specific online activities. A lot of them use Mac minis or Powerbooks as extension to their classic setup - eg. file transfer, browsing, amiga compatible filesystem creation (usb sticks, hard disks, etc), extraction of huge files, e-uae etc.
But I agree that MorphOS could use some better drivers and more applications and games.