The current FreeBSD version the hacker displayed was from around the time of the sale so that tracks.
Nishimura for most part become a Japanese public personality - he has wrote for Japanese tabloids and has a YT channel.
Certainly explains why 4chan fell way down his priority list.
This in general is the main factor of the decline of the "old web". Many of the people who drove it, who run these forums, are simply happier running a substack, a subreddit, a facebook group, without worrying about servers.