Question on Data Model Scope for LWS Implementations

Hi all,

I understand Linked Web Storage (LWS) to be a superset of Solid (Social
Linked Data), and I’m getting ready to begin work on an implementation. I
have one key question that I hope someone might shed some light on.

I realize the FPWD has been delayed, but perhaps this can still be
clarified:
Will LWS be strictly tied to Linked Data (i.e., RDF) as its data model?

Projects like Unhosted have often taken a broader approach, incorporating
JSON and other formats alongside RDF. This is an important consideration
when planning implementation scope and tooling. I completely understand
that consensus may not have formed yet, but any early guidance would be
very helpful.

Thanks in advance!
Best,
Melvin