It’s Complicated (tm), a hybrid of the two. Text content across multiple CRDT enabled blocks may be connected in a single logical CRDT, but the segment visible in any given block is stored in that block object, which maintains our permission system invariants. We’ll still support moving blocks to different pages, so one page may have a few different CRDTs visually interleaved.

API consumers are unaffected. Likely we’ll support API updates of text as best-effort diff-match-patch of the text on our side applied as CRDT ops.