[mryingster]

My current OS actually stems back from the Public Beta that I ran on my G3. I've cloned the data from HDD to HDD/Computer to Computer and upgraded the OS every time, and it's currently on El Capitan (because my Mac Pro is no longer supported). I've never run into issues during an upgrade.

[peatmoss]

You surely must have done the "transfer my settings and apps" on the PPC->Intel transition. I can't imagine the HDD clone method working through the architecture change. Still, I'm impressed that settings haven't borked anything since then. There have to be a lot of stale plist values that aren't used any more, I'd guess.

[mryingster]

Oh, I'm sure. I've used the migration tool when going from one mac to another (Specifically from G4 to Intel iMac in 2006) which might clean some things out. Looking at the plists in my ~/Libray, I have some dated as far back as 2001. I also still have my MacOS 9 installed on my main hard disk :-P