> But for desktop use there are crazy good options these days

Citation, please? Really, I'd love to know what those options are.

I know of nothing that works particularly well on desktop on more than one OS.

For all its faults, Electron works pretty much the same everywhere ... Windows, Linux, and macOS.

I don't know about how much love JavaFX gets these days, but Java + JavaFX is a strong combo.

For .net you have Avalonia that is also cross-platform.