There is really only one fundamental problem with email: its mechanism for managing who takes part in the conversation is all wrong for team communication. The symptoms of this problem are myriad: reply-all storms, cya-by-cc, replying to a 5 month old email rather than starting a new thread, fyi forwards, etc.
Which isn't to say that all the advantages you list for email are not true. They are. It's just that most people will shy away from an otherwise-decent solution if it has terrible UX.
Which isn't to say that all the advantages you list for email are not true. They are. It's just that most people will shy away from an otherwise-decent solution if it has terrible UX.