Pretty damn powerful. The next level above this is a search index that lets the user generate their own results, using their own machine learning algorithm or ranking weights of their own preferences, bc they would have direct access to the DB index and features. People could wrote anti-ad plugins. There could be foss upgrades all the time. Nobody would have to spend a particularly crazy amount of money on storage if they could all just cache the bits they’d needed themselves. Quite remarkable imo!! Whatever ends Google search’s reign, will probably be user-owned in a way that seems a lot like this..