My personal hunch is that the only gap is a developer training gap. Since ~2014 there were a bunch of copy-pasted bootcamps selling "MEAN stack" or "JAM stack"

My personal hunch is that the only gap is a developer training gap. Since ~2014 there were a bunch of copy-pasted bootcamps selling "MEAN stack" or "JAM stack" or whatever, but all of them centered around JavaScript. It seems like the assumption is that everyone does web, so we have to shoe-horn JS into making native apps with tech like Electron, React Native, etc. But, the JavaScript ecosystem is actually very complicated. I'd say it's just as complicated as Qt or GTK, but maybe they lack the kiddie pool introduction that making small JS programs for the browser offers. If JavaScript isn't your comfort zone or you don't come from frontend web development, Qt in particular is awesome. It comes with a ton of primitives that you don't have to reinvent from scratch. It has UI controls that do the complex stuff you want without having to pile a bunch of event binding code on it. You don't even have to write C++. It bothers me every time I read about Electron's redeeming quality being that it allows web developers to build native apps. Python is a "web" language, and you don't need to write anything but Python to make a great Qt app. A famous Electron app like Slack could have very well been written by web developers using Python, and I bet it would feel snappier than today's Slack. Good luck with your GUI system, btw. I'd love to see what you make.