They support UWP which includes all modern Windows environments (Windows 10, Xbox One, Windows Mixed Reality)
There is experimental support for MacOS, but it's actually very far along, close to being usable for production if not already.
Linux support isn't very widespread for many cross-platform technologies in the first place, so Electron is the best bet there. Maybe someone will make a react-qt project.
> Other platforms such as Windows 7 & 8, MacOS, and Linux can be targeted using a web wrapper solution like Electron.
That's interesting, but Macos/linux support are a hard requirement for what I work on professionally / side projects though. Windows support isn't.