Comment by YPPH

There's something deeply satisfying about compiling a Win32 desktop application and knowing that single binary will run unmodified on essentially every Windows machine from XP onward, and look nearly identical doing it. High-DPI is the one real caveat, but even that's manageable with a manifest. I'm not sure any other platform-native API comes close to that combination of reach and consistency. Running them on other operating systems is really just a bonus.