I remember when there was a whole bunch of competing IM platforms, and apps like Adium and Trillian that would let a person manage multiple platforms in one app. I also remember being ahead of the curve and leaving that client running 24/7 so people could message me whenever and I would get it when I got home. Too far ahead though, mostly because IM wasn’t ubiquitous enough so there was like 3 people that I’d actually interact with regularly. Then IM kind of disappeared when text messaging took off, and finally came back when smartphones meant you could get those IMs anywhere.