In my case, I use a few different distros around the house, arch for my desktop/laptop, fedora for the htpc, popos for my wife's laptop, elementary for the kids.

Having a single boot drive to install / update / fix problems is handy.

I know running `cat distro.iso > /dev/sda` isn't hard but at least I don't need to tie up multiple 32gb flash drives with 700mb isos.

I think the main thing today is that I have very high capacity flash drives regardless, may as well make good use out of them.