I don't think using a local web port for the UI of a desktop app is a good idea, at least for security reasons. I guess much of the resources of the alternative

I don't think using a local web port for the UI of a desktop app is a good idea, at least for security reasons. I guess much of the resources of the alternative solutions are used to mitigate just that (in addition to having a powerful backend framework). So if you don't want either, than maybe it is an option, but it severly limits the scope of the architecture.