Casually running 3 operating systems on one PC

...so?

This is a rather low-quality post. You didn't even tell the audience what operating systems you are running.

3.. those are rookie numbers. You got to pump those numbers up! Qubes welcomes you

I'm impressed, just because I've never had the need to do this.

So, like Windows, Linux, and macOS? Or 3 different distros?

The hardest part of it all is keeping grub's sh*t together.