There was only a single standard before, so there was no reason why a company should make any company specific standard. The need for companies to make a standard only exists, since the master to main change, because now there are two standards.
Except git init still creates branches named master without configuration (although with a warning), which will only change in 3.0 for obvious reasons, and tons of people (including me) still use master, and old projects don't just vanish.
