Lessons from Implementing RAG in 2025

Hi HN, after reading through the comments sections on blog posts about RAG, I was finding a lot of differing views. Many people have had an entirely unique experience trying to implement a RAG system, due to the nature of their data, the scale and their goals. The underlying tech also changes so quickly that new methods show up every day, and old methods become outdated quickly.

I put together this blog post trying to capture some of the experiences we had building a RAG system at TrueState, and trying to put together a centralised, up-to-date review of the concepts.

If anyone has any feedback, suggestions, or wants to flame me for something I've gotten wrong, please let me know!