This is exactly how Tumblr works, and is a big part of why Tumblr is actually a great social network for the people who have stuck it out there.
So the social difference from Twitter is they kept the chrono following-only feed? It's nice but not what I envisioned for Recents. I wanted to avoid any kind of global "trending" aspect and focus all interaction on reposts. I'm probably reinventing a wheel somewhere, but not one that I've seen.
Come to think of it, this what User Agents were supposed to be, but we just added a few more layers on top (for that sweet sweet ad revenue juice), and now are stripping some of it with the likes of Mastodon.
The problem is about their content censoring. I don't reckon Automattic reversed the "sexually explicit" purge initiated by Yahoo. I'm not interested in a social network that censors ~30% [1] of the global art production. For now Twitter is the better place for relatively free content sharing.
[1]: Number pulled out of my hat, but the human nude being the most popular drawing subject ever, I wouldn't be surprised if this is close to reality.