Micro-posting (a la Mastodon) apps offer an interface optimalised for short text and image posts, which seem to work better for chatty exchanges than for fruitful long form argumentation. Yet most of us have fallen for the temptation to let casual chats become friendship-ending arguments.
What if we could tag a reply as "debate" - or the author could - and it greyed out the reply button on that post. Obviously this would be a setting that can be toggled on and off.