We did the Superhuman Product/Market fit study: https://firstround.com/review/how-superhuman-built-an-engine-to-find-product-market-fit/
And 40% of respondents said they would be "Very disappointed" if they couldn't use Kitemaker anymore. That is the Product/Market fit threshold!
Do we have Product/Market fit? Well, no, we're not experiencing that kind of growth. So, we will continue working on growth and improving the product.