The thing about subposting is that I've come to regard it as frequently being the ethical choice of "I have thoughts about another post I just saw on on This Platform", in a way that somewhat applies across specific platforms.
Cohost cultivates a very conversational feel to its functional Quote-Tweet equivalent, "repost and add", which actually makes it feel worse when it's used to fundamentally disagree with people. QTs are at least framed as citing someone for the starting point of a new thought; replying is...replying. If you'd balk at vaulting onto the stage at an open mic, grabbing the mic stand still warm from someone else's fingers, to open with "THAT LAST SHITHEAD—" then, uh. 🤷 And replies, in that metaphor, are collaring someone as they descend from the stage to go "OH HEY. I HAD THOUGHTS ON THAT" and if you wouldn't use that kind of opportunity to go "YOU SHITHEAD" either....
Subposting puts a bit of impersonal distance between post and response. And I truly think that's sometimes the correct thing to do.
