[epicide]

And before Slack there was Skype, Lync/Office Communicator, IRC, AIM, XMPP, Hangouts, and email. It's not like having a lot of chat platforms is a new thing.

> I'm not sure when chat rooms became a business tool.

As soon as somebody figured out they could use something other than email lists to send messages to people in a business setting.

If people get mad at you for not being available, then it has nothing to do with which, if any, chat apps you use. It's a disagreement in expectations.

[compuguy]

Add Sametime to that list, ugh.

[Danihan]

Why won't anyone else use ICQ for business with me

[jetsnoc]

Look me up, 575061. =)

[hatchoo]

Funny how folks still remember their ICQ. Mine is 952050