Showing enough information for your users to sensibly understand what they should do is important, but thats not what the article was about[1], it was about the application developer wanting to pass-the-buck when there application failed because of a Heroku error.

This is really lame because, you chose to host on Heroku not your customers, so it is your fault. You can play pass-the-buck but as far as your customers are concerned it is your fault.

1. "..Quit blaming all of us"