I just noted that Slack released Mark as Unread. It’s just a form of moving a TODO list where you want it, which feels OK to me as long as your TODO management isn’t too disjointed. Should it be everywhere then?
For DM’s, I could see that being useful. I have one right now I know I need to respond to that I’m worried I’m going to forget about. I actually wish I could move it over to email easily. I can, by asking, but that’s not always desirable. When opportunity is coming to you, asking for context shifting doesn’t feel right.