This could be summed up into one word. Wil used 500-ish.
For whatever reason, technology companies tend to follow the traditional line of diversification. Get success, get more success. Diversify. Apple does diversification better than most. iPhone, Mac, iPad, Services, Wearables (Watch, AirPods, Beats…). See? Google, like Microsoft, has a hardware line with nonexistent profits.
So, Google’s hardware is an attempt at diversification. Vanity, too.
Google, like Microsoft, has failed at hardware. That’s what Apple does better than Google, Facebook, Amazon, and Microsoft.
Hardware is hard.