It really was Mac OS X's Vista moment.

Edit: It'll always be Mac OS X to me, not macOS.

Windows Vista primarily suffers from technical issues. Aero is virtually unchanged in 7.

Yes! You are not alone. The name Mac OS X has always felt special to me.

OS X? Surely you mean Rhapsody

Mac OS X 27.

10.27?

But that means there were two each of 10.11, 10.12, 10.13, 10.14, and 10.15 :-)