[oppositelock]

Sometimes, people can't be on the latest version of software due to various compliance and regulatory issues, and updating anything to a new version requires some kind of re-certification or new auditing. So, when supporting such users, you need to work carefully on balancing their inability to update, versus yours to move ahead.

Hacking on some projects or experiments is one thing, but say you're providing code for the automotive industry or the payment card industry; you're in for a world of regulatory hurt.