They called it "Latest Tweets" https://web.archive.org/web/20200205092104/https://help.twit...
- Lists as tabs
- _Heavily_ reduced spam
- Can look at Twitter without logging in
I'm likely missing some other obvious/uncontroversially good changes.
I still use Twitter and plan to continue using it. I am satisfied with most of his changes.
Edit: I reversed “for you” and “following” in my original reply.
Edit: Why am I downvoted? It literally did, it even was named as you'd expect it ("sort by latest" or something), tho the location was less obvious as it was under the stars icon above the feed.