Calum, on 06 November 2012 - 19:05, said:
Personally, I hope everyone starts using Facebook for all communication (apart from face-to-face talk in real life, of course), even in the business world. I aim to start using Facebook for all of my communication and I'm already having my emails forwarded to the Facebook Messages section. Facebook Messages isn't quite good enough to replace email yet, but it's getting there. I think it would be pretty cool if everyone used Facebook for all communication, but then I am a huge fan of it

In corporate environments, there's a very strong reason why they prefer to keep business correspondence on mail servers under their own control. Facebook Messenger would be the next to last avenue to send over sensitive information!
As a substitute of texting it works fine, but we're then expecting everyone to have Facebook accounts when some people have valid reasons not to be on Facebook.
On topic, I'm fine with this decision. They ran the desktop client to hell since 2011. Ever since they kludged together contact management with what used to be Windows Live Spaces, and then opted to keep contact management on the web, something that used to be simple became an unnecessary headache. Not to mention the amount of alternative clients that broke and continue to break due to protocol changes.