Delphi yes but moving to enterprise costing models lost the market.
.Net no they lost because .NET ios not as easy as VB6 - VB6 is more like a GUI shell language linking controls together. Easy to quickly do something but if you need more detail then not a good language you have to write the controls and that requires another language. .Net threw that ease away, if you are at the level of wanting to alter controls then yes it is better but I think having the two languages was better for enterprises. However nowadays the replacement for VB6 is web programming.
Delphi still has a big enough market to host an yearly conference in Germany, and otherwise there are occasional tracks on .NET/Windows conferences like BASTA.
.NET Forms is definitly as easy as VB6, even more so, because C++ was out of the picture.
VB required delving into VBX (C++), and even VB6 OCX doesn't support everything in COM, meaning some kind of controls also required diving into C++ for VB 6.
I will argue .NET's Windows Forms is an easier and so much better successor to VB in all aspects. It has even survived through the .NET Core and .NET era.
It feels like we're finally starting to overcome all that we lost in the decades since VB6/Delphi for Windows.