So.. this is just a visual representation of the karma/upvotes/brownie points, what’s new here?! You will still have the same upsides and downsides of the current social media.
wrt to the upsides and downsides of social media, I think this is trying to provide an alternative to the, I've said this in another reply too, 'list style' design choice of most social media. In my personal opinion, I think it's a bit brutish from a design standpoint.
Along with the 'repository' that you can always go back to that makes positing feel like climbing an infinite mountain as opposed to 'theoretically' moments of potential delight that come and go.
This is definitely just a few of my subjective points about what I think Bloom addresses, but I appreciate your point of view!
My first "social media" was h2g2, and everything since has been a downgrade.
For what it's worth though, If you're the poster of the thought, the post along with responses are available to you forever. They just 'die' from the point of view of the collective.
Of course, I understand this doesn't necessarily speak to your specific 'needs' but it is an overlap I kept in because I do resonate with your desired approach.