Firstly, I wouldn't call this "Satoshi era". Satoshi left the forum/community by the end of 2010. So really only 2019/2010 can be conidered Satoshi era. Everyone onwards (up to a certain point) would simply be the innovators era, or early adopters. If you could otherwise put block explorer tx or links in the OP it'd otherwise be appreciated, as it's often quite simply to see where these coins have actually gone.
They might have been working on it since 2020 I guess? Finally, they got it and now they will divide it with 10000s of people.
If I am wrong, then happy for the guy who participated in the initial stages of Bitcoin, that's a big reward for him.
Do you have a source for this, or is it merely speculation? Last I checked all MtGox coins were more or less labeled and signposted, so that when they move, people are aware that they originate from this source. Similar to Silk Road hack or other type of coins that are in the public eye or domain. Generally speaking, these coins don't move without someone noticing it from automated alerts etc.
Overall this seems like pretty boring/irrelevant news. It can be summarised as someone transferring their coins from a legacy address to segwit/taproot after 10 years. Even if it is a lot of money.