This point stands to be underlined! Even the least possible friction is more than people at large are willing to deal with, it's only if the system changes are pushed from the top (rumblings in the EU block at the mo) that we'll see casual consumption of Linux in more mainstream context. Having run Linux Mint across a 50+ coworker setting from a sysadmin perspective this is entirely doable, most will not even notice as long as Chrome is in place alongside with something office-like.