Developers often make assumptions about hardware in their code, and then will complain when the hardware they're given doesn't match what they anticipated.

Even if it doesn't actually matter for performance reasons, they expected things to be one way, and want the environment to adapt to match their expectations, even if they might be expecting a wholly un-maintainable environment.

And I'm sure it works exactly the other way, too. The developer doesn't understand why the environment isn't what they expect, or isn't like the lab, or whatever.