I was playing with that for a while myself and I have a G4 Cube that runs OS9 if i feel the need
I predate OSX and so I've been through the good and bad of Mac OS. There have been buggier versions, though as I mentioned before I found Tiger to be the best OSX version up until Mavericks. Tiger offered a stable and lean OS, after that with Leopard I felt there was a lot of bloat creeping into the OS. Mavericks is a breath of fresh air being a tighter more efficient OS with a good balance of features P)