Web vs Native UIs

Not with the current state of the UI frameworks, not really.

You're confusing the technology to create UI with the UI itself.

Web is very inferior to any modestly well done UI toolkit.

Yes, at the end of the day, one can see why there are UI frameworks like Qt, GTK, Cocoa. It took many, many, many years and people to develop them and they are designed for complex desktop interfaces.I don't like this constant reinvention of wheels. Look at Blender, it also has its own, mice UI and many other specialized graphical, image and audio apps have. Flutter also renders its widgets.But none of them is as universal and flexible as those big, battle-tested frameworks.They are n

What is the advantage? Does it make some things easier that are very hard to do in languages / frameworks traditionally used to build app/webapp GUIs?

I worked with a non-software team that used this to build a UI about two years ago. It’s great to spin up something quickly, and worked well for a team that didn’t have much UI experience - to a point. It becomes very hard to maintain and navigate as soon as any complexity comes in - much harder than Qt, Winforms, or Swing. The styling was lackluster. Maybe it’s improved in that time, but I think its place is quick one-off UIs and rapid prototyping.

I think it's also about the tooling.With most "native" platforms you can have a WYSIWYG UI editing (because those markup languages were designed with that in mind). You visually define the layout (with mouse/trackpad), drop components there, and it's all nice and easy to use. Surely, you can code your UI as well, but to best of my knowledge no one in their sane mind does this, unless they have some very good reasons.With web apps (progressive or not), the usual app

what languages are known for convenient UI development?

Why do we keep trying to make web sites into a UI toolkit?!

I think UI builders are considered as good tools, it’s the XML that is “not needed”