Re: <sigh>
You say that, but people who habitually send + archive through muscle memory appear to have had a rather poor day. Seen reports of one person who responded to a request for a job interview acci-clicking the mic drop (previously send and archive) button, and one from a funeral director to a client who had just had a bereavement, too, earlier in the twitter chain thing (there's a link to the product forums with more)
I'd imagine whatever 'zany' wonk came up with this idea isn't terribly experienced in how users work.
Or that adding 'hilarious' features to core functionality of a platform that is expected to work day in, day out by business and private users alike probably isn't the finest of ideas.
Steven R