[norman784]

I think the issue (read on HN a lot of comments about the subject) is that there is no unified vision/goal inside Google, there are a lot of teams with different goals and visions, but it seems that the most common goal for their employees is to get enough merits to get promoted, forget about the old project and jump into a new one (because new things give you merits to continue climbing).

I could be wrong, with no insight information this was my conclusion after reading comments and also seen too many products killed by Google, even releasing new worst products to replace old ones that were better.