Most of enterprise Java jobs in mid/ junior engineering level are similar to old times production assembly line, everything has a Factory or Impl from dependencies. All you have to do is add bunch of methods and connect API's and service bus (of course I'm extremely simplifying it, but) it's not hard to find people who can do that, also it's not hard to get them up to speed for what needs to be done so the churn rate doesn't impact a lot to enterprises which is a big win. In my personal experience I don't think that's possible with C++ so Java may have started with "write once, run anywhere" now its more of glue between longer running actors and constantly changing workforce