However, IMHO of equal - if not GREATER - importance and entirely missed from the blog post is "be clear about what you are doing with people's data".
You might well have just written the next unicorn dog's bollocks of software, but I (and I suspect many others) couldn't give a rats arse about your "journey" or any other marketing fluff if the practical reality is that you are secretly collecting telemetry all over the place, storing my data to train your AI algorithms and generally engaging in all sorts of other privacy infringing practices.