Yeah, my "main" personal machine is a 2011 Air that no longer can run the latest OS. My 2006 Mac Pro got replaced on its 10th birthday with a new iMac as it was

Yeah, my "main" personal machine is a 2011 Air that no longer can run the latest OS. My 2006 Mac Pro got replaced on its 10th birthday with a new iMac as it was an OS or two behind. I'd say 8 years is sorta the outer limit.