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Why aren’t motherboards mostly USB-C by now?
(philip.greenspun.com)
This is a most excellent place for technology news and articles.
Nah, they usually advertise one USB-C port with full speed and that is the only one who gets it, even if it has 2, 3 or even 4x.
Btw, the DeskMini is the only full-spec PC i know of, which doesn't use additional chipsets for I/O. There may be a few more boards like this, dunno, but additional I/O chipsets are incredibly common.