Martin Kleppmann in one of his recent talks about the future of local-first, mentions the need for a generic sync service for the 'local-first end-game' [0] as he calls it. Standardization is needed. Right now everyone and their mother is doing sync differently and building production platforms around their own protocols and mechanisms.
The problem is that the requirements can be vastly different. A collaborative editor is very different to say syncing encrypted blobs. Perhaps there is a one size fits all but I doubt it.
I've been working on sync for the latter use case for a while and CRDTs would definitely be overkill.
[0] https://www.youtube.com/watch?v=NMq0vncHJvU&t=1016s