There are some ongoing theory-crafting in this thread, but the real reason seems pretty simple; Larry and Sergey obviously don't want to deal with all the management and operational stuffs, but only "moonshots" like autonomous vehicles or quantum computing. Yeah, this was the whole purpose of establishing a holding company, but Alphabet has grown by 2 times (both in employee count and revenue) and probably they're no…
Has he though? I get the sense that he’s really Balmering it up in that he inherited a super successful company, and didn’t do much with it except not screw up.
The two big growth areas- social and cloud- are dead or a distant and growing third.
Google hasn’t done much new or exciting through his whole term. So no new products, the 2016 election and congressional testimony debacle, randomly firing different people with no sound reasoning.
It would be neat if someone could establish a vision beyond “10% growth forever through lots of rent seeking.” Maybe a company has to go through their Ballmer to get to their Nadella.
Maybe they can somehow convince Jeff Dean to be CEO and just write an AI that generally maximizes profit.