Additional question:
Are we current still in the "I hope your summer is going well" stage or now in the "I hope you had a good summer" stage?
Though latter always sees a bit like subtle criticism that you did not in fact do all the writing you told yourself you'd do...
People who pay attention to such things: is starting an email without the ritual "I hope you are well" now considered actively rude, or is this just a habit acquired by the bots that write most of my incoming mail?