Maybe he wanted to burn the bridge publicly in order to make it more likely that he will keep to his decision. "Can't go back now that I've said I'm leaving." k

Maybe he wanted to burn the bridge publicly in order to make it more likely that he will keep to his decision. "Can't go back now that I've said I'm leaving." kind of thing? But if he does decide to go back it leaves a nice opening for the follow-on post of "Why I decided to go back to reading HN".