In terms of what? It's not like Electron, Qt, or gtk have been around forever. Programs with UI existed well before they did.
One of my favorite applications that I use basically every day is convert. It takes up about 500KB on disk, consumes about 1.7KB of RAM, runs on anything from Windows 98 to Windows 11, and runs on Linux via WINE without issue.
I guess I don't know what it was actually written in, but it sure doesn't seem like it was any of those 😅.

What the actual mother fucking deep fried double wide inbred corn sucking bull shit are these god damn cunts doing now? Jesus, Mary, Joseph, and all his carpenter friends sigh. I'd apologies on behalf of my country, but I don't think enough of it truly cares enough for it to mean anything, so instead I'll just say run, and quickly.