If I had created Google I would have peaced out looooong ago.
Sure, I wouldn't disappear completely, but I'd work on low-stress things where I have a lot of free time and don't have so much responsibility under me.
I'm looking at early retirement in the next year or two. I'm certainly not anywhere near as financially successful as Brin or Page or Pichai, and I doubt I've put in as much stressful work as they have, but I've done ok for myself, and I'm looking forward to doing literally anything I want with my time, without having to answer to anyone, whether it's a boss, investors, or board of directors.
I guess only time will tell how much I like this arrangement, but I'm pretty optimistic about it, and am tired of hearing the usual "oh but you'll be bored and want to work again" tropes. There's a lot more to life than work...
Or children ;) John Lennon famously quit music for 5 years to raise his second child, after failing his first marriage.