Let me be super opinionated for a brief moment, just to reflect on my personal experience with the integration of RW in SN.
I think the value of this endeavour comes with the opportunity it provides to ponder, paraphrase and contextualize a single idea within your personal body of knowledge. The card format is perfect for just that.
On the other hand, if an idea is not worth a card then why import it to Supernotes? In paragraph-based apps, it is tempting to just concatenate all notes from a single source, but does that serve a purpose? If we are after a dump for assorted snippets from external media, well, then there already is Readwise. There is no need to recreate that.
Again, that’s just my personal experience, and I’m curious if you can come up with an in-the-middle-solution that also fits with different approaches to Readwise usage.