I learned recently that Hitachi actually shipped computers that would dual-boot into Windows 98 and BeOS R4, except that Microsoft's license didn't allow for dual-boot, so the option was removed from the bootloader (or, rather, the Microsoft bootloader was defaulted to, instead of the Be bootloader).

It wasn't that hard to boot into Be, but I suppose most users wouldn't bother because all games and applications were on Windows anyway. Ultimately, lack of apps was probably what held it back, although Microsoft's commercial practices definitely played a role in curbing OEMs and app developers.

* https://en.wikipedia.org/wiki/Hitachi_Flora_Prius * https://news.ycombinator.com/item?id=44217322