For me personally, the takeway is that both GTK and QT are getting old.

React (and Svelte, etc.) have completely changed the way we build apps, and typical QT & GTK apps are still being written in a retained mode approach with signals & callbacks like 20 years ago.

QML is quite interesting but it doesn't feel immediate mode enough like React & Svelte.

Flutter, JetPack Compose, Crochet, Fidget, Revery, MakePad, Svelte, etc. all those bring so many new ideas. GTK or QT feel so complicated and hard maintain in comparaison