I don’t think its that unlikely, depending on the workflow. For example when I’m working on a game in Godot I have Godot itself, aseprite for texture editing, trenchbroom for level editing, audacity for sound editing, a 3d modeling tool, a code editor, messaging app, music player, that’s 8 already and not counting the browser!
I think you might think I’m arguing against Godot for app UI. I’m not in fact I’m totally in favour of it! What I’m originally saying is that people who are against it, argue it’d because its inefficient compared to regular UI toolkits. To deny that would be a lie, because yes, it is. But that doesn’t mean you don’t use it. You just understand the trade offs your making, and you try to minimise those tradeoffs with optimisations. If every app ignored optimisations for efficiency, wed be in a much worse situation. All those apps run smoothly in tandem because devs have made the optimisations. Its good practice to try and do the samez if you use Godot for app UI.