[giulianob]

If you use the Godot editor you'll see it's already sophisticated enough for general purpose UI applications. Of course you can keep expanding the requirements until no software in the world meets them but if you know what you're building then it might be the right choice. The main benefit that you won't get with almost anything else is true control over how every pixel gets actually rendered to the screen. It's able to make cross platform applications which since you're in full control over how they're actually rendered gives you tons of control. Resource utilization is fairly low and again you have full control of the stack so it's as good as you're willing to make it. C# is supported nowadays which gives you access to a mature ecosystem of libraries.

Is it the right solution for all UIs? Clearly not but IMO the UI landscape is a mess at the moment for anyone who wants to be able to build cross platform applications. There aren't really any adequate solutions as far as I can tell.