Papers “being in” a journal hasn’t made sense for a long time, but curation is valuable as is staking reputation on something.
People I was with called some of this “badges”, there is no reason why a paper cannot be reviewed by a set of people who say “this is new and innovative stuff in the field and highly important if true, but we’re not making claims about the stats” and a different set able to say “the stats here is spot on but we don’t know how relevant it is in biology” and another to say “we can rerun the code and get the same analysis results out, but we don’t know if the analysis is doing anything useful”. Right now we have journals making some combination of claims, and authors have to pick a single journal.
Once you view journals as a list of papers, the exclusivity seems weird. Once you see that journals are then a set of identifiers added to a paper, or rather statements about a paper, there’s lots of interesting ways you can imagine more useful things than current publishing.