I see where you're coming from. However, the slight shift, I think, is that nothing lasts forever or changes about the individual in an 'on-platform' way. You can't discern posts by users who came yesterday from a year ago or someone who has received a lot of responses like 'karma' would. The individual user can, of course, by tracking their 'achievements' progress but the validity or interactive nature of the thought is time-bound and 'in the moment'.

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!