Microsoft went exactly the same route. After certain critical mass of PMs were achieved, things went only downhill. I am not saying engineers somehow are superi

Microsoft went exactly the same route. After certain critical mass of PMs were achieved, things went only downhill. I am not saying engineers somehow are superior but the fact is that there is no real hiring criteria for PMs so overall talent pool gets very diluted very quickly. Good PMs like Spolesky are worth gold but there is no way to identify them during interviews. Now that Google has 6 versions of chat programs, GMail UX that is mess, Maps that are stagnant - you can see same outcome that Microsoft saw.