I think one thing that makes them stagnate is the sheer magnitude of their advertising business. Google is not interested in expanding to other things unless it

I think one thing that makes them stagnate is the sheer magnitude of their advertising business. Google is not interested in expanding to other things unless it is either furthering the amount of data they are collecting for advertising, or it has some massive run rate. That is why they are infamous for canning projects that are actually working, they just are not working big enough for google to care past its many billions advertising.