There are different degrees of glass jaws. Haye's mandible may not be as fragile as, say, Amir Khan - but it's ain't too sturdy either!
Punch resistance is only one of the question marks on Haye after that performance. But he's fighting on. Ain't no stoppin us now - inc matchroom ref Foster.
Depends what level he fights at. I would still pick him to beat Charr for example. He isn't retiring with so much cash floating about Femi and Fury - and not when he was still on his feet and swinging last night. He is a shot fighter but there's nothing unusual about that.
Haye's biggest issue against Bellew wasnt his chin, it was the loss of his speed, reflexes and explosiveness due to age and injuries. All the 3 components that made him a great fighter are lost in the current version of Haye. What is left behind is a boxer who has poorer basic fundamentals than Tony Bellew and has been beaten twice by him, and would be again and again and again.
If Haye carries on, he may be the new Roy Jones, going round the world getting knocked out left right and centre for money.
That's his future if he chooses to continue. I think Wilder is a total fraud, for example, but he would starch today's Haye in a round or two, tops. Joshua would utterly obliterate him.
Glass Jaws exist in boxing. It an important role which I support, and there needs to be more awareness around this issue.