Yes, my new computer contains the new two terabyte hard drive with Windows 11 on it, and my old hard drive from my old computer with Windows 10 on it.
I needed a new computer because World of Warcraft out grew my old computer, but Windows 11 sucks rocks and wont install any of my older games, including Zoo Tycoon.
So I sent the new computer and the old computer back to the computer guy and asked him to install my old hard drive in the new computer so I could switch back and forth between the two of them.
So now it starts up on the old Windows 10 hard drive, because I do all that stuff in the morning, then when Im ready to play WoW, I restart the computer, the prompt comes up, and I switch to the new Windows 11 hard drive.
And I absolutely hate Windows 11, the next time I have to get a new computer, Im going back to Macintosh.