[weimerica]

Alternatively, and depending on the severity, they can recognize they've hired a bad (apple|fit) and separate, possibly update the hiring process, and move on.

While adding in new technologies isn't always a bad thing, having nothing but a desire to do so is classical Resume-Driven-Development. If your firm is in a business position such that having all the latest, greatest tools is a good thing (hard to imagine industries in which this is an unqualified good) then keep on trucking. Otherwise you may find yourself needing to have adult conversations with $RDD_DEV about just what it is that makes the business money, in light of technical decisions that cost additional time, have larger TCO, and so on.