I can kinda understand the desire to simplify it to "macOS". Through the years it was - System 1,2,3,4,5,6,7 - Mac OS 8 - Mac OS 9 - Mac OS X And it remain

I can kinda understand the desire to simplify it to "macOS". Through the years it was - System 1,2,3,4,5,6,7 - Mac OS 8 - Mac OS 9 - Mac OS X And it remained at "X" for about 16 years, with sometimes substantial releases being distinguished just by a big cat name or a decimal point. Arguably the "X" part stopped being part of the versioning, and simply became part of the brand but it was definitely redundant and "mac oh-ess-ex" is at best a bit clunky to say. It certainly wasn't necessary, but I can at least understand why they'd want to do it.