[jerlam]

Outside of laptop monitors, there are only a handful of monitors that are "Retina-quality" (>220 ppi). It is very doubtful that programming is difficult or impossible on all other monitors. Most computers cannot also drive a 32" 220 ppi monitor.

[copperx]

That's true. It was really hard to find a 24" 4k monitor for my desktop. It's insane that people can tolerate lower PPIs after seeing a Retina-like screen. You can't go back.