That's certainly annoying, but please don't start a new thread with a shallow dismissal. It leads to lousy discussion, and this article has a lot more interesting stuff in it than that.
The guideline that asks "Please respond to the strongest plausible interpretation of what someone says, not a weaker one that's easier to criticize" applies to articles as well.
Given that the oldest millenials are mid 30s (most start the generation at 1981) is this really noteworthy? That’s a typical age for people to be assuming positions of responsibility even in traditional companies.