John still wears socks to bed, even after.
It's become a habit, perhaps. When you do something every night for practically a year and a half it becomes something you don't notice. But he does notice in the morning when he wakes up and it's not two in the morning, it's nine.
His clothes for the day are laid out, complete with a change of socks, which John changes every morning. He really doesn't need to but he does all the same.
If his heart breaks a little every morning, when he realizes that he will never be woken with a shout of 'John, come on! It's urgent!' again, then that is his own pain and he will not share it with anyone. They wouldn't understand