It's obvious from the outside, isn't it. Hindsight is everything. But the reality is is that Slack is an application made by a real company by real people/deve

It's obvious from the outside, isn't it. Hindsight is everything. But the reality is is that Slack is an application made by a real company by real people/developers who all faced real constraints. Go build Slack for yourself, through the same history they have, and lets see what we come out with.