Most programs are pretty horrible in 4k with win10 too.
Intellij, Cygwin, Ubuntu VMs (DPI scaling worked well in vmware at least), VS Code, VS proper, sublime, idle, cmd, cmder, IDA, Tableau. I can't think of a single application (except for Eclipse) which I noticed not scaling well.
RStudio on Windows (fixed now, and some workarounds) - https://support.rstudio.com/hc/en-us/community/posts/2065421...