PMF is usually the tricky one. You should focus and talk the people you are trying to sell your product to even before you build anything. Starts with asking and identifying if they even have a problem you are trying to solve, how are they solving it today, is it even important to them … You can get sooooo much info just by talking to you potential customers, users … And, it’s really mind-boggling how few startup founders ever really talk to their customers.

I know what you mean by charting/mapping the problems and their solution. But I think/feel this method doesn't work anymore, it feels like "2012-2022 world". How can one sell something that doesn not exist even by the seller? You are selling just the idea, not the implementation. Of course that could lead deal also, but it's more of people-to-people trust/business, than about real existing products.

And now in the "post-AI" reality, trusting anything people sell is hard.