Chroma does vector, full-text, and regex search. And, it's designed for multitenant workloads typical of AI applications. So, not just a "vectorDB company"

yeah, but they benefit from convincing people not to dump everything in context, because the alternative is to dump everything in a db (like Chroma) and then retrieve only the relevant parts (whether that's using vector search or regex search or full-text search or whatever). I still think their thesis is correct, but readers should be aware of the author's bias and make their own judgment.