It's a neat solution, but I suspect, in the end, it kinda misses the broader point. From kbin, it may seem like a neat or good solution, but from mastodon magazines and communities, whether from kbin or lemmy, are equally opaque rather unusable entitles. Kbin's solution works for filling up feeds on kbin. And, if the whole fediverse worked the way kbin works, it might be awesome!

But, it doesn't, and so mastodon users still aren't actually interacting with the conversations going on in communities and magazines, except for the relatively rare occasions that they make a top-level post or actually follow a community. Getting mastodon users off of mastodon and into our communities/magazines is what matters here (AFAIU). Their number and "fedi-readiness" make this a valuable goal. But also a potentially important one so that mastodon users learn that there's more outside of their somewhat brutalist platform design and the idea of more complex and rich fediverse interactions becomes more normalised.

Broadly, I suspect the way forward will be having client apps that bring together various platform structures while the devs of each platform can focus on their platform without having to reinvent everything everytime they make a new platform or feature.