SQL Server Management Studio 18 won't open (only splash screen pops up)
I just overlaid the Microsoft.VisualStudio.Shell.Interop.8.0.dll in C:\Program Files (x86)\Microsoft SQL Server Management Studio 18\Common7\IDE\PublicAssemblies with the copy from ..\PrivateAssemblies\Interop and the IDE opens. (Thanks to Mitch for discovering the offending DLL name.) 

This looks like a popular Q &amp; A today, so I'm glad to know this wasn't just me.