I secretly (well actually it was an accident) switched a completely nontechnical user from Windows to Linux. He figured out how do email and browse the web, but complained about not having office and some Windows menu options. In short he didn’t realize it was unix or even know. But I fixed the default for dual booting to boot to Windows and he is more comfortable again (although also more vulnerable).
I have dual boot too- do all my online stuff during the day in linux- then at night switch to windows for photography related work and windows only games- (although I could do the games on linux in steam now i guess- never tried though)- This schedule works well for me- but someoen who is constantly switching from linx to windows throughout the day would find it tedious to keep rebooting I guess-