Do you think complexity and scope stayed the same? Or did it increase? Do people have to know more now to have the same level of depth and surrounding knowledge?
You can change drive letters. So you could copy, then swap the drive letters between partitions.
But for the OS it's not so simple - at least for Windows. Specifically because of the Windows registry and hidden profile data and Windows activation.
By that point I'd consider a file copy, registry backup (for selective restore; but may not be worth it), and reinstall Windows on the new partition. Trying to clone-move in a working way is a hassle and error-prone. I'd consider ensuring getting the Windows license over much easier. (A documented workflow by Microsoft.)
Loss of registry means many things may have to be reinstalled and reactivated, but I'd still prefer that.
I wanted to use it because of some bad Win11 start menu/window bar changes. But I had other issues/deficiencies with Cairo. I worked a bit on it but ultimately didn't land or finish any of my changes, and haven't been using it.
It's certainly different and with various settings. Worth a look or try.
If you're going for hosted, I'd always use github (userbase, UI, free features set). If you're self hosting, gitlab is a good alternative. Their heavy promotion of and focus on full chain into managed cloud can be irritating and annoying though.
Gitlab has a free tier too. If you're curious, try it out.
And what's their conclusion?