A friend and I started building a SaaS product a few months ago. The original idea was product 101. Find a problem space that looked interesting, talk to some people, see if there was something worth solving, and then use our product and engineering backgrounds to build a solution. Coming from enterprise, we thought we had a reasonable understanding of how products get built and adopted. Between us, we've spent decades building technology, working with stakeholders, running projects, and shipp...