I searched for "Supabase" and none of top the results in your demo contained an actual post about supabase. Following the example queries I then tried "What is supabase?" and the results were equally irrelevant.
My personal opinion is that I'll keep using the HN search for the foreseeable time.
I had the same issue when searching for specific companies/products. It feels like a pretty basic vector search with no hybrid search component or reranking.
My personal opinion is that I'll keep using the HN search for the foreseeable time.