@smokey Thanks. I wasn’t necessarily thinking I needed "reply all,” just wanting to make sure I hadn't missed something that was already there. The auto-fill for @-mentions, which I discovered on my own just before I read your reply does make this easier, and Manton's reasoning kind of makes sense, at least for now, but suppose, for example, a group of people wanted to engage in the poem exchange/discussion that @juliansummerhayes suggested in this conversation. If that group grew to be large enough, even the auto-fill would become unwieldy. Or maybe those kinds of groups wouldn’t really fit in to Micro.blog--and that, too, makes a kind of sense to me.