The thing that really struck me about Slack was its level of polish, esp compared to other software around the time of its release. The overall level of polish

The thing that really struck me about Slack was its level of polish, esp compared to other software around the time of its release. The overall level of polish on similar apps has risen since then so that’s less of a differentiator, but I still refer to Slack as a great example of polish and consistency in product, with mostly great UX as well