What if you are not a making these mistakes, how is Heroku (or another service like it) going to bring you to a harsh and ugly reality? Well, if you are runnin

What if you are not a making these mistakes, how is Heroku (or another service like it) going to bring you to a harsh and ugly reality? Well, if you are running a startup from scratch - you ARE making these "mistakes" because you certainly aren't focused on the minutia of performance tuning and significant scalability concerns. Most startups at this point are still trying to get the aircraft off the ground - much less thinking about switching on the auto-pilot for cruise.