What ONE technical problem lies in the way of you building your dream product?

Here's why I was thinking about this: I always wanted to build a web application where you enter a website URL and then get a full summary of the company. So, that would be their service/product offerings, their address, the details of the founder/s and team, their story, the kind of business model - all in one nice report. I thought this might be doable when the LLM API's came along but having a LLM API make sense of from looking at their top-level pages - home, about, team, etc. - is still technically very difficult, as far as I can see. So I was wondering: what ONE technical problem lies in the way of you building your dream product? Thanks, Pete.