Im on woocommerce planning for fibosearch since it has an SRT less than 0.2 seconds. Their site says It uses an ultra-fast search engine based on one of the fastest search database structures, the inverted index. Also, all AJAX requests work in a special WordPress SHORTINIT mode. This all makes FiboSearch Pro the fastest self-hosted search solution in the WooCommerce market.

Because of the inverted index database structure and other tricks, there is no significant difference in the search speed if there are 500 products or 50k products.

Now, offload search with searchIQ. Do you have a good argument for me?

Seperate to the deal. If the analytics is not lifetime, its a problem. Rather pay 750 and have 50 sites / 1.000.000 documents and kifetime analytics