WERTS:  Well, I guess we will never know for sure.  I do miss him, though.

I think Anton just lost interest, but at least Apollo is still available.  I like the model and have used him.  He never had a lot of support, but the hair creators did continue to make hair to fit him for a very long time.  I used Wardrobe Wizard to convert some M3 items for him, it worked really well.