Can't speak about Visual Basic, other than it apparently worked just fine for small-to-medium complexity UIs. On Delphi side, there was significant difference

Can't speak about Visual Basic, other than it apparently worked just fine for small-to-medium complexity UIs. On Delphi side, there was significant difference between "code produced by someone just starting out" which tended to make an unholy mess of generated code mixing UI and non-UI operations, but it was quite workable for bigger projects if the developer was more experienced and put some architectural thinking into project (for example, separating business logic and the UI code that called into it).