consider how many pixels a 5k monitor has.
try drawing a 5k monitor full of true type fonts in software sometime.
try drawing a 5k monitor full of true type fonts in software sometime.
Things like filling rectangles or scrolling have been hardware optimized for years on Windows without using any OpenGL and it works even on ancient graphic cards. So I think it might be a better technology for a text editor.
Yes - for example, Apple has been shipping 5K 27” displays in iMacs for three years now.
You struggle to find a 5K display outside that one machine that Apple doesn't seem all that fussed about compared to their laptop and iOS offerings.