I’m using Dorico on Win10 on a Microsoft Surface book (3000 x 2000 hdpi display). Dorico appears to be obeying OS scaling correctly (I tried 100,125,150, and the recommended 200%). I didn’t see anything particularly wrong at 150% on my display. With Sibelius I run it with hdpi scaling overridden with system driven scaling. Both seem to work fine on hdpi displays, although I think Dorico’s UI looks a bit more modern and cleaner on my Win10 machines.