The pizza is long gone, but does anyone else wonder what the guy who accepted the 10,000 BTC ($380,700,000) did with them and does he have any left?

None of us can know this. But we are not oracles in any of us. Under the conditions of that period, spending was made according to its value. If we knew 10 years later, we would all be rich anyway. At that time, I know people who bought btc and made a lot of sales in small increases.
I honestly don't know why I bother anymore ...