Instant messaging is an example of something that used to work, and now doesn't. It used to be that everyone was basically on AIM, which functioned as an open enough network. Status information worked pretty well - you could fairly easily tell if someone was online, and so people could respond. And now - we have dozens of clients, such that there's no way of knowing which subset your contacts use. With the prevalence…
Did presence ever really work though? I’ve been online since the late 90s and I don’t remember ever considering it reliable except perhaps for people on IRC who I knew had a transient internet connection (namely dialup). I’ve never really paid much attention to or trusted presence status, with the exception of statuses that are manually set (e.g. do not disturb in Slack and similar). It’s kind of funny, considering t…
I'm glad you've been blessed with whatever Apple Magic lets iMessage work across devices for you but between my iPad iPhone and MacBook all I can say is I follow up important messages with a phone call because it's one of the more unreliable and indecipherable systems I've never been able to figure out.