Cool. You do that

Are you going to install multiple versions of every library?

What if it’s a security fix and it’s in issue in your desktop environment, etc

Coreutils and glibc aren’t the only libraries on your system

Some apps might use static linking too so might need to be restarted. Other libraries might be loaded long after the app is started. If you swap libraries half way, it’s not great too

What if you’re copying large files half way and run out of space. That nuked my Linux mint install

Linux distros don’t just copy Windows. They wouldn’t put in the extra effort unless they have to.

Do you think a bunch of developers sit around and don’t evaluate why they’re doing things? And instead just copy from Windows? Nah mate. They do it for a reason

The cool thing about doing it this way is if boot fails, you can rollback easily too. If you’re installing core components randomly, your system might only fall to boot a week later