Yes already did through most of them. Either we have libraries around CRDTs or we have full BaaS (think Parse if anyone remembers or Firebase) soft of things that possibly can be self deployed but have a very heavy and iron clad curtain on the underlying storage medium (Postgres/SQLite) etc exposing a world view of their own.

tinyBase seems to be the only one that stands out in that regard or this LiveStore now.

PS: Thank you for putting this landscape. That really has enabled me or anyone else to look at what options are there. No amount of googling would do that kind of compilation. I find it very useful.