Honestly, I had no idea. I recently had to have my MBP repaired (new logic board... as always). So, I got it back with the latest OS (Monterey). I needed to download some software that was for specific versions of MacOS, and I honestly didn't even know there was a OS 12. I thought I was still on "OSX".

If it wasn't "Monterey" and was just MacOS 12 there would've been no confusion. I feel like it's always an exercise of looking up the code name to find the version whenever someone is like "Yeah, I'm on Big Sur" .... ok one sec, let me google what that even means.

That doesn't help when people like to refer to the version by its name only, omitting the number, which forces you to do a lookup against wikipedia or whatever.