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I read it as "we will be adding features that make sense for VB (which might also make sense for C#), rather than keeping it in sync with C#".

Allowing it to evolve on it's own, rather than being C#'s ugly little brother.

That risks libraries becoming incompatible. 99% of the top libraries are in c#.

That's explicitly called out in the article: they will make sure libraries written in new versions of C# can be used easily in new versions of VB.