Standardized infotainment dimensions and connectors are pretty sweet stuff, and I wish it'd make a return. Looking at cars now it all seems so custom.
Standardization still works between companies (e.g., interfaces between parts for computers, that are put together by computer-manufacturers), but not where there is no advantage for any company.
A bit of plastic for an over-priced OEM infotainment module is more useful than being able to switch suppliers for radios easily.