Building the UI was superfast. Wiring the logic was somewhat painful but manageable. But you did not really need more than that to build CRUD apps. For everything else, you had C/C++ and the Win32 API.

I am a huge fan of keyboard-only navigation and you could achieve a large part of the extremely rapid data entry methodology of DOS UIs of the 80s and early 90s with considered key-handing. You never even had to look at the screen for the most part; only at the document in front of you.

Microsoft killed it with the move to DOTNET. VB.NET was a different beast, and C# was a superior language. But it was never the same. I moved to web-uis in the late 2000s. Painfully slow way of writing business apps, but the complexity can be managed if you can reuse templates/components.