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Emacs it's not an IDE (out of the box), so it's not your use case, obviously.

If OP wants to compare Emacs to Visual Studio and Jetbraines IDE's, then we are going to compare features.

Go ahead comparing apples and oranges, what can I say.

OP literally said emacs has extensions IDE's will never have.

I've never seen an IDE with an equivalent to smart-dash-mode:

That's nice, dear. Can you work with .vcxproj files?

Deflect much?

If you know of an IDE that has anything like smart-dash-mode, I'd be very interested to hear about it.