477
All the other brands went along
(slrpnk.net)
This is a most excellent place for technology news and articles.
RJ45 and HMDI in particular are way thicker than usb-c
True, yet they would totally fit, and do fit on the newer Macbook Pros. And many professional class laptops have RJ45 w/o making it any thicker (port flips down, so it doesn't need to be full-height always).
RJ45 connectors are commonly a folding down connector. HDMI can be replaced with a micro HDMI and is often replaced with additional USBC to utilize display port alt mode.