Ah okay I was using innovation more in the way it’s used to describe a distinct big impactful change. I didn’t know the meaning of the word is simply change.

I included “either” at the end to point out I don’t see any of the three desktop OSes having done much of anything for a long time.

20 years for Mac is a long time though. OS X was just coming out then. I think just based off the fresh OS and simpler/cleaner user interface Mac was doing initially were decently big changes. You could say that only goes up to ~10.4 before there aren't many impactful positive changes besides security changes every one has been doing. 10.4 came out in like 2005.