You also want to mention an additional reason: native toolkits have to be tested multiple times; once for windows, once for macos, once again for Linux and wha

You also want to mention an additional reason: native toolkits have to be tested multiple times; once for windows, once for macos, once again for Linux and whatever else you want to support. Even if you get QT deployed for a Mac version, there's still no guarantee they look the same on Windows. Each platform has its own quirk. With fewer developers working with these toolkits, we see less adoption, more issues, etc.