When you want something really bad, you will put up with a lot of flaws. But if you do not yet know you want something, your tolerance will be much lower. That’s why it is especially important for us to build a beautiful, elegant and considerate piece of software. Every bit of grace, refinement, and thoughtfulness on our part will pull people along. Every petty irritation will stop them and give the impression that it is not worth it.
This is from a memo sent to the team at Tiny Speck, the makers of Slack, on July 31st, 2013. It had been a little under 7 months since development began and was 2 weeks before the launch of Slack’s ‘Preview Release’.