Native, not WebForms 2.0. If WebForms was made in javascript to begin with we'd have a stable 20 year old UI framework right now rather than 20 years of disaster after disaster. It really does take a big tech company with a zillion developers to create good frameworks and tools that survive for decades. Things you can build on confidently and not have to worry about when you'll have to do the next rewrite. No one is writing SQL or C# worried about some new version obsoleting all their code or those platforms being abandoned.