I actually like the idea of Stories (vs say a giant group text), but I don't think 24 hours is workable for the people I Signal with because we're not in Signal routinely enough and everything will just delete before anyone sees it. If it were configurable I'd probably set it to a week or a month. Actually, I don't know why they would fix the time at 24hrs. We've always been able to set the time period for disappearing messages.