At least for Qt, the answer's quite simple: you'd have KDE and the associated apps. As for the stability of the front-end ecosystem, it doesn't exist. The many

At least for Qt, the answer's quite simple: you'd have KDE and the associated apps. As for the stability of the front-end ecosystem, it doesn't exist. The many articles that were posted on HN over the years complaining about the endless quagmire of front-end frameworks, libraries and technologies explain this better than I could.