We use both because both have reason to exist. Since I started working in a multinational company spread across different sites (and continents) I have appreci

We use both because both have reason to exist. Since I started working in a multinational company spread across different sites (and continents) I have appreciated both approaches: sometimes the chat is a quick way to ask something, to verify that something is working etc.. compared to mail (that is not always seen "in time") or using the phone (as a bonus points, IMHO for non-english speakers it is easier to chat than to talk...)