It reminds me of an older dev I met when I was just beginning who had worked even more years and said Fortran 95 was "fine". And he could use it to build pretty much anything. That doesn't mean that more powerful language features couldn't have increased his productivity (if he learned them).
There's something to be said for using the right tool for the job. There's also something to be said for maximizing your ability to hire developers. Software is a game of tradeoffs, and while I can and do still pick up modern hotness when warranted (e.g. Zig), sometimes the path to minimum total software cost (and thus maximum company value) is to take well trodden paths.
As fun side anecdote, if you're doing scientific computing in a variety of fields, Fortran 95 is mostly still fine ;)