1. I can't easily go and look back at everything that was said in a call. Notes are not a replacement for this. 2. Phone calls are too real-time, to the point

1. I can't easily go and look back at everything that was said in a call. Notes are not a replacement for this. 2. Phone calls are too real-time, to the point where you can't manage multiple separate phone calls near the same time or do something else if a phonecall only requires some attention. Calls have their place, but I don't think they're a replacement for written communication.