It would be like a search engine for ideas and concepts. Perhaps something like public roam graphs will be the solution to this, but there are infinite ways to approach it.
One of the weirdest things about the Internet is that even though we’re just a click away from the greatest authors of all-time, from Plato to Tolstoy, we default to just scrolling Twitter
One of the most important companies in making both of the non-Amazon value-chains work is Shopify, which is a platform, not an Aggregator. Google and Facebook may collect the customers, but it is Shopify (and WooCommerce, its open-source competitor) that provides the infrastructure for merchants to actually sell things online.