[scubbo]

Depends on their situation and environment. If they have a good manager who recognizes that "helping someone to grow" is better for both sides of the interaction than "drop 'em and take a risk on hiring someone else", and/or if they're in a situation where the engineer can accept the risk that their manager isn't that, it's certainly the best bet.

Employees are an investment. An employee who can take the initiative to flag-up areas that they could benefit from training is valuable.