In terms of adjacent technologies, I'd love to see the rss guys get some love. Their podcast 2.0 initiatives have integrated zaps and value splits which allowed them to expand to the music industry (ripe for disruption).

Their world has been colliding with nostr.

Rss as the music distribution layer while nostr as the social discovery layer. All of it coming from a self-sovereign pov, putting power back in the hands of individual artists. Coming from someone in the traditional the music industry, this is a very significant shift. Potential for disruption as large as napster was back in the day.