> > "Nobody emails with just “Hi” and waits for a response" > I have to say, the zero-context "hi" in a Teams message has to be one of the worst violations of what we used to call netiquette.

I am guilty of this, but only on MS Teams. If you want to setup an audio call where Person A wants Persons B and C on a call together, you set up a new group chat. On MS Teams, the Start Call is disabled until the first message. So I will often put "hi" as a chat starter. MS Teams doesnt seem to see a chat as a bona fide chat until there is some spark of conversation, hence "hi"

Ok sure, but your use case doesn't necessarily imply that the "hi" message is sent without any surrounding context (ie, a previous message(s) preparing recipient for a call). My complaint was about a lone "hi", preceded by nothing, and followed by nothing (ie, putting the onus on recipient to respond to signal readiness to discuss... who knows what). It interrupts potential flowstate, creates an open loop, provides no hint as to priority, eliminates possibility of leveraging power of async comms to close a loop, and guarantees recipient comes into the future interaction unprepared. It only takes a few extra seconds to provide context ("hi, I could use help understanding X when you get a moment, ideally today"), so NOT doing that is, IMHO, either ignorant or rude.

What I do is call person B and then when the call is started add person C. Usually in a group chat if I hit the call everyone button it’s by mistake haha