Again, maybe I've had more bad managers than the average (in my 17 years of professional experience I've had 2, maybe 3, good managers), but there's no guarante

Again, maybe I've had more bad managers than the average (in my 17 years of professional experience I've had 2, maybe 3, good managers), but there's no guarantee that will happen. Maybe in areas like SV, where good professionals with solid experience have no problem finding another role and companies are actually trying their best to keep good employees that happens more often. What I've seen is people skipped for promotion in favor of the manager's son friend. Or in favor of someone "recommended" from above. Or many other forms of nepotism. I've seen wonderful managers-to-be being kept in a lower role because the company didn't want to cough up the increase in salary. And, as said before, invariably I've seen these people end up leaving and going somewhere else, causing the department a few problems (organization, lost know-how...). BTW, reading my comments on this one might think I'm bitter and maybe I am: I worked 6 years in Spain and France, where nepotism is the norm and techies are considered second class citizens. I must say that I don't think I've been skipped for promotion many times and personally I haven't had many issues moving up (and down) the ladder in all the places I've worked. But I also know that one of the reasons for this is that I've never had a problem with getting up and leaving a company if I wasn't happy.