Being able to choose your algorithm, possibly even to customize it, seems so obvious to me that it surprises me it's taken so long.
I'm working on my own (Fediverse) site that I hope will some day give you the power to tweak your feed exactly the way you want, but so far nothing about it works, so don't hold your breath on that one. I don't really care about Bluesky doing it because I don't really care about proprietary social media anymore. I want a Fediverse site that does this.