tl;dr
Corporations are used to email and see no reason to change it, email (Outlook) just gets more plugins as new things emerge.
Maybe I'm old fashioned but I see no point in trying to replace email. It is an app just like everything else and any serious application should have some form of email integration.
Maybe I'm old fashioned but I see no point in trying to replace email. It is an app just like everything else and any serious application should have some form of email integration.