Conceivably you could open source the algorithm, or even better, have a variety of algorithms to choose from with custom parameters.

In a similar vein, I'm not sure if anyone remembers Slacker Radio, but it was a competitor to Pandora/Spotify/etc. It had its drawbacks (hence why it isn't around anymore), but I absolutely loved the amount of control you had when building custom stations. You'd first seed a custom station with a bunch of musicians you like, and then there were a number of parameters which allowed you to fine-tune the algorithm to a remarkable extent, well beyond what today's music apps offer.

I'd love to get to a place where we have options other than just saying "welp the algorithm" and just giving up, I think that the ability to customize one's algos would be a killer feature that the fediverse can offer which the major platforms generally won't.