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 recipien

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.