Sorry, but I am not going to read it as it is not an apple to apple comparison atm. OpenAI just released its assistants APIs literally just weeks ago, when so called vector databases have been burning money for ages. You can write a thesis on how those vendors are doing slightly better for now, that won't be the big picture showing the reality on the ground. All those minor issues & unreasonable restrictions can be solved & removed, I don't see any real challenge for openai to implement them. Give openai a few months, they will convince most vector database vendors & gamblers to pack up and leave the field.

let me repeat what I have already explained - when compared to today's leading AI tech, a "vector database" is just ancient tech. major players are going to build their inhouse solution or they'd conclude it to be some kind of labor intensive & low profit margin baggage and outsource it.

you can build a business around it, just like all major tech companies have cleaning guys work for them one way or another, people have to realize that it doesn't make carpet cleaning a high tech or strategically important business.