Which of these have you used and how are they useful to you?

Do you think this is relevant at earlier stages of a project or only once you have tons and tons of docs?

My instinct is that many LLMs.txt become less relevant over time as AI tokens become cheaper and context becomes longer.

llms.txt is a failure because it's designed for crawlers that want to collect bigger datasets instead of being designed for RAG.

What's actually needed is e.g. javadoc jars stored in a central repository, but in a more structured format than an html export.