Feeds can be personal, so you can decide how granular to you want them. So far I'm able to follow every conversation on the different topics I like, so I would say it works quite well so far.
They can be public too, but personally I prefer to customize my own.
https://piefed.zip/post/100161
All comments from 5 crossposts in a single view
A few options
!interstellar@kbin.earth