I wonder if, for instance, disabling SIP will be perpetuated in clones (when and if cloning ever becomes possible)?
I can see how that could go either way, but I suspect the reason it goes one way or the other has far more to do with Apple's plans for macOS 12 than compatibility with macOS 10. For what it is worth, I am finding the boot volume by boot volume settings useful in troubleshooting. Sort of like the traditional test account
My primary issue at the moment is the inability to create a bootable external drive. If that can't be worked out, clones per. se.
are almost useless.