That doesn't answer the question. Even Spot requires constant battery swapping to be able to function all day. Its battery life is measured in minutes, not hours.
The comment referred to robustness, not endurance.
I made https://lessnoise.net/, which recommends who you should unfollow on Twitter (right now it's very basic and just shows you who tweets the most out / is noisiest of everyone you follow)
Gmail and Android can be considered moonshots, completely separate bets from the cash cow search product. They have both been enormously successful and been the starting point for new revenue lines (the whole GSuite for businesses, the Play Store)
Next moonshot which looks extremely promising is Waymo
Which I guess means it's harder for e.g Social Capital to do a pump & dump (in the case of Clover they couldn't sell until June 2021 at the earliest)
[1] https://corpgov.law.harvard.edu/2018/07/06/special-purpose-a...