While it's true that things in the opensource world can still go awry, the difference is that the code is always there for anyone who wants to pick it up and have fun with it.
To me, an Amiga-like OS on the fastest hardware available makes perfect sense, and as soon as I have myself another (third!) x86 box under this desk, I'll be using AROS regularly, and hopefully I'll be able to start developing software for it too :-)