Does Heroku reach out to people that are running WEBrick in production? Or do you have a report or something showing how many are running WEBrick in production? I agree that it takes a lot of ignoring of warnings and documentation to run WEBrick in production, and Heroku's docs do a great job educating people, but nonetheless I meet people (usually 1-2 people startups where tech founder isn't very strong) that are running WEBrick in prod :(