https://www.superusapp.com/

This one perhaps a mix between Kosmik and Affine, with a little Stack Browser...

Already has a lot of web excerpting tools on a whiteboard browser...
My mind is reeling on how to use it best/effectively.
That said, for another very early product, it's working pretty nicely!

here's his essay about the challenges making his product to date,

I found it quite rewarding as a read for a CRIMPer..
https://medium.superus.space/building-the-foundation-of-the-meta-layer-app-a-spatial-workspace-with-web-browsing-and-8f5d39cbe456