Customers for other trades similarly "don't know what they want", unless it's "fix this for me". The main difference in the software world is that you can pote

Customers for other trades similarly "don't know what they want", unless it's "fix this for me". The main difference in the software world is that you can potentially build things "once" (or rather, keep building it forever) for a huge global market, which means that it's hard to know when something is good enough. With roofing or coffee, you do good enough work (differs between companies, sure) and move on to the next customer. But you don't think about adding continuously running rainfall test for the roofs you do to ensure no regressions (leaks) appear.