AliciaLynette, thanks! Can you give an example of when you might use the auto-options instead of typing something?
I remember a few years ago, "read receipts" were in vogue for emails. Like you'd open the email and this thing would pop up and say, "The sender has requested a read receipt. Please click yes or no to indicate you've read the email." Or something like that. I think the few times I encountered one, I was a bit freaked out, and I would click no--like, no, don't be spyin' on me, computer! But, remembering that the read receipt had been asked for, I would usually reply to the email in my own words, so the sender would indeed know I'd read it. It was never a big thing in my line of work, so I never had to develop a "sensible protocol" for them or anything.
But it does seem like, as AliciaLynette says, somebody somewhere wasn't getting replies they needed--enough people that the email companies keep coming up with different tools to prompt people to reply. It would probably be difficult to figure out which was the bigger problem--too many replies, or not enough--and it would be very specific to different companies, industries, and jobs. But really, it's no wonder individuals get confused trying to decide what to do, with "anti-thanks" articles on the one hand, and your email prompting you to reply on the other.