I can sum up the situation with two sentences:

I hate writing Win32 apps, but I love using them. I love writing .NET apps but I hate using them.

The problem with Win32 apps is that although they look ugly, in general they're blazing fast and work basically everywhere. The problem with .NET apps is although they're aesthetically pleasing, they require the relevant version of the framework to be installed. I remember fighting with installing a .NET-based driver installer that insisted on installing an ancient version of .NET that Windows wouldn't allow to install. Win32 support is still universal.