I've created a concept of system that allows to defer to others' judgement of what is the best feed: EigenFlow.

Each user can specify whose posts they want to see in the feed and in what proportion, plus borrow portion of that other user's feed. (In code, these are represented by coefs_see_own and coefs_defer_feeds.) That creates system of linear equations, which pretty often has a solution.

I feel like this could be useful for developers: if you have a more productive colleague or friend, you may simply take a look on what articles they read, and maybe that will help! So the discussion is welcome; and in particular, I'd like dev.to to consider this.