Thanks that's such an interesting article.
Mastodon, or its derivative services, can massively improve by giving you the choice of an OPEN algorithm to use on your feed. The default time-stamp based feed is fine, but would I like to have, with one click of a button, the same feed based on the open-source recommendation engine “Engine A”, and switch to another “Engine B” just to see how the feed changes? You bet!
This would be a cool option.