> Just out of curiosity, what does a Linux desktop offer that's not also natively offered in Mac and also highly polished?
Freedom, a full GNU userland, proper package management of the entire system, plethora of CLI programs which can fulfil your every need and only really work on GNU/Linux, configurable, etc.
> Every year I try a switch to Linux desktop. This year I made it as far as trying to get multiple monitors working well. I also dabbed in gaming. In the end I went back to my work=Mac game=Windows duopoly.
I use multiple monitors every day for my work under OpenSUSE and Arch. They both worked with either minimal (Arch) or no (SUSE) configuration. I use DisplayPort which works pretty well.