[sys_64738]

When you let your manager know you're unhappy then they can also quickly move to hire a replacement and fire you. You don't own a company anything beyond the last paycheck you received. Two weeks notice is the norm and, hey, it's just business. Don't take it personally if an employee leaves.

[jamesbrady]

Your first sentence is true. Perhaps it's overly reductive of me, but if that's what your boss would do you're in that red "you should leave anyway" box, in my opinion.

A few other commenters have pointed out good reasons (e.g. visas) where you need to keep your cards closer to your chest, but the vast majority of people reading Hacker News can find a role where it's not so transactional. Where you're valued as a person and teammate, and where you can have a grown-up conversation about your career plans.

Those open conversations are harder to have if you truly believe your second sentence, however!