> No matter what operating system you're on, you'll eventually run into an application that doesn't render in high dpi mode.
I am using using Emacs and tmux under Linux, in the Gnome desktop. Gnome has HDPI scaling. For me, that works fine with a 4K 43 inch display. The thing you need to watch out for is to get a graphics card with proper open source (FOSS) driver support. Some cards are crap and don't come with FOSS drivers. You can get them to run but it is a PITA on every kernel update. Don't do that to yourself, get a decent card.
I am using using Emacs and tmux under Linux, in the Gnome desktop. Gnome has HDPI scaling. For me, that works fine with a 4K 43 inch display. The thing you need to watch out for is to get a graphics card with proper open source (FOSS) driver support. Some cards are crap and don't come with FOSS drivers. You can get them to run but it is a PITA on every kernel update. Don't do that to yourself, get a decent card.