Bespoke search engines for varying topics, with revenue generated by subscriptions and not ads. They already exist to some extent, for example searching researc

Bespoke search engines for varying topics, with revenue generated by subscriptions and not ads. They already exist to some extent, for example searching research articles we have ncbi/google scholar. But this will be taken to the next level, with search engines for social media (reddit, hacker news), movies/tv shows (justwatch.com as a basic example). Of course there's Kagi which imo is worth every dollar.