I've been in the telco/digital communications space for years and all this stuff has run from 48V for decades. So basically plenty of electronic parts are already available with margins suited to 48V already since it's extremely common in other industries like the one I'm in.

Automotive just tends to be a pretty slowly changing industry, but everything is ready for them to adopt 48V that other industries have been using for a long time, someone just needed to take the plunge I guess.