I think it’s “Safe” as in “No one was ever fired for choosing IBM” or more on the nose: If you choose to install Linux on all company computers and the CFO gets mad when Excel doesn’t work, why aren’t we just using windows??!?!? Then it’s your ass on the line. You will have a million enterprise software vendors that supports Windows, fewer that supports Linux.

It’s no longer the safe bet for a lot of companies/countries because of how USA is being run at the moment, but that’s s whole other reason.