It's sharp enough but when compared to a native 1x/2x scaling, it still looks blurry, and it's only seen physically for me. Currently I run my M1 MBA at native 2560*1600 (BetterDummy, non hiDpi), and my 27" 4k at native. Set default zoom on chrome to be 125/150%, and VSCode also at "zoomed". I mostly use Chrome and Electron based apps (Spotify), so the increase in text sharpness is worth it. Native apps (Pritunl, etc) UI becomes too small, but again it's worth it for me.