To put things into context a bit, MorphOS 1.3 was first released as a non-beta OS in 2003, fourteen years ago. Compare that to some historical cases:

Commodore 64 was released in 1982. Not many people were still using it in 1996.
Windows 95 was released in 1995. People were certainly not using it in 2009.
AmigaOS 1.3 was released in 1988, and not being used in 2002, at least not for its Workbench functionality.

...and so on.

So I think MorphOS is doing quite well, considering. It still gets updates, albeit slow ones, and still has users. Could be a lot worse. You could be getting screwed over for every tiny driver update like those poor OS4 guys, for instance.