Not really such an "early" retirement.
But he's doing charity now, while still having more than 100 billions for himself, so somehow he's a saint.
And all of the billionaires donate money, I don't think that sets him apart from the others all that much.
Now that he's gonna go soon (and having just a dozen more human gatherings and dinners left).. we can see that he fully doesn't give half an ounce of fuck after having received in full what he was after.
After much show, Buffet's "charity" money got simply inherited by his kids just as it was planned all along! (taxfree too, you plebs!)
The billionaires that care about the world are like Larry Page, tho still so evil.
They are the literal sensei of Zuck the greenhorn and friends. So exceptional that the world thinks they're the exception.