Yeah, the system does not handle it well when you delete a user. There is no way to easily delete all the posts. And it makes threads look funny. There are a number of guests.
In this case, it was a request. He has developed other interests that are taking all his time. That is all I know. More than I usually share. Sometimes life decides to take a different fork in the road.
LG, you will be missed on here!! He also moved on from another forum. I'm going to send him an email, I know him a while from another pipe forum. Something's up, this is not like him.