I did a hackathon many years ago (before LLMs) where I spent a serious amount of effort training a conventional machine learning algorithm and integrating it in

I did a hackathon many years ago (before LLMs) where I spent a serious amount of effort training a conventional machine learning algorithm and integrating it into a react native app. I had a genuinely impressive team to make this possible given it was 2016. The winning team bought a bootstrap theme for $35 and made a landing page for a nonexistent app.