If I remember correctly, ReactOS just uses wine under the hood. Which can be used in linux and even mac or bsd too.

Basically (compile to windows?) seems like a good enough tradeoff to run anywhere, right?

But I prefer appimage or flatpak because of the overhead that wine might introduce I suppose

> If I remember correctly, ReactOS just uses wine under the hood

Nah. I think they share some effort and ReactOS team adds patches to WINE codebase, it is a separate thing.