I did read it. Here's the company post that the article references and links to.
The social proximity thing is about replies to posts. Since replies are often a mix of people I follow and people I don't, I think it could be helpful to prioritize replies from people who are connected to those I already follow.
They say the dislike button will apply to "Discover and other feeds" which is a little less relevant to me because I don't use discover. Maybe I'd check it out more if it was better.
It would still be important to me that I have my unfiltered feed of posts by everyone I follow in chronological order. The post by Bluesky doesn't indicate they're changing that.
Even so, if they were actually altering that feed, my understanding is that you can switch to a different front end which uses whatever ordering/display logic you prefer. Catch of course being someone has to have created and maintained such a front end, and many people will just stick with the default option.
A buddy and I were playing with Sonobus this morning. It lets you collaborate on music remotely.
Musicians will know already, but if you're not aware, the latency (lag) between participants makes it impractical to play in time together. But if you can get it below 30ms then it's roughly equivalent to playing with someone across the room. Needs a hard wired connection and the other people probably can't be more than 500 miles away. But for me eliminates a two hour round trip to work on a song.