Only one thing though: this only affects a very small minority of users. Most computer users will only have one operating system on the hard drive, if only to free up disk space (many Linux distributions can use up tens to gigabytes of disk space just for the operating system and the free apps that come along with it).
I’d really like to know which linux distro’s those are.
I run OpenSuSE and my OS footprint is less than 1.5G (that is including Libre, extra drivers, and lots of productivity apps for work. I also run a windows 7 vm for work (so it has to be fully patched) and it is clocking in at 15G. The VM eats more drive space than my bare metal linux installation.