The author left out the most important detail:

- Before being ready to leave, make sure you either have, or will have, another opportunity or no need for an employer. VERY often (especially in tech!) employers/managers will have employees, not for their labor, but for vanity, to build a pyramid to themselves, or for image reasons. Such people will immediately send you packing for complaining about non-productivity. Your perception of your superior's alignment can easily be wrong.

Given that precondition... I agree with the premise.