> Just out of curiosity, what does a Linux desktop offer that's not also natively offered in Mac and also highly polished?
A GNU userland. A plethora of tiling window managers. A selection of clean terminals. Every single thing Debian's or Arch's repos offer which one must turn to brew for.
And of course there's freedom too, which is nice.
> 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've got multiple monitors running on Linux, over HDMI, at home & at work, at differing resolutions & orientations. I use arandr-configured xrandr scripts which set my desired orientation with a quick keystroke in my window manager. What more does one need?