Everyone jokes about it finally being "the year of the linux desktop", but a few years ago that actually did happen to my circle. Between a mac for work and linux at home, I actually haven't touched windows in a number of years at this point, and interestingly, neither have a reasonable number of the technical people I interact with. Of the nontechnical people around me, many of them have transitioned to primarily us…
I wouldn't look forward to training anyone to use Linux or Apple products that's not familiar with them already.
Additionally, I still can't get my camera or mic to work on Ubuntu on my Dell XPS 9700, tried Mint as well and the wifi doesn't work on it. Linux needs to address its multiple driver inconsistencies (or Dell does) before it'll ever become the norm in a business environment. The only other 2 viable computer manufacturers for businesses are really Lenovo and HP which have problems too.