HiDPI on Linux is only broken if you need fractional scaling, or different per-monitor scaling factors. If you stick to screens that work well at 200% (e.g. 4K on 24"), then current desktops will work just fine in my experience.

That sounds like a draconian restriction if you are coming from Windows 10, but OP is switching from macOS. Macs have traditionally used either 100% or 200% as well (except for the latest-gen MBP).