It is worth pointing out that this is 37 Signals. Which means, just by dogfood-ing, they get rid of many of the major 3rd party app categories. Productivity so

It is worth pointing out that this is 37 Signals. Which means, just by dogfood-ing, they get rid of many of the major 3rd party app categories. Productivity software make up a lot of the most useful 3rd party apps, and 37 Signals makes web productivity software that cover the same territory. It doesn't mean their point isn't still interesting, it's just good to remember context.