Hi,
linux on PPC is much less stable that on 386. I have several programms, which suddenly crash on PPC. This is no special prob of a linux dist, it's a bug in certain libraries .. eg. Qt.
There are no commercial apps for Linux PPC (eg.Eagle, vmware..)
I'm currently trying to replace a PIII with a PEG, so I know what I'm speaking of ...
( The PIII ran SUSE9 and had an uptime of 2,5 years, no sudden stops of some apps ..)
Let's be realistic. Linux is optimized for 386 and only runs absolutely stable on 386. .. but I is quite useable on a Peg for no MTBF-hungry apps.