Re: Email already passé?
E-mail really just works. If you don't like your provider it's pretty damn easy to move all your old e-mail as long as you control the domain. This is example of why standard protocols are good.
Some people think that these IRC-like services will solve the problem of too much e-mail. Until the network effect kicks in and you're back to square one. Or worse, because chat is really inefficient. On a service which now owns your data: lock-in that you pay for.
Some companies (KLM) are trying to move to WhatsApp for customer service, probably because they benefit from the metadata that Facebook can provide them.