The thing is that the WINE project currently does and will continue to provide the userspace logic to allow this. ReactOS is a heavy user of WINE, and different

The thing is that the WINE project currently does and will continue to provide the userspace logic to allow this. ReactOS is a heavy user of WINE, and differentiates itself in that they are recreating the most basic components of Windows, including the kernel in hopes of getting a binary-compatible driver layer. Long-term compatibility will be provided by the WINE project. ReactOS is only necessary if you need to run Windows-specific drivers, and I don't see that being useful in 10, 15, or 20 years. We have other systems that can provide kernels, driver, and other low-level interfaces (like a basic shell) and depend on WINE in userspace to preserve compatibility.