> working disk & file system

And a working ECC or non-ECC RAM bus, and [...].

How bad is recovery from WAL checksum / journal corruption [in SQLite] [with batching at 100k TPS]?

And should WAL checksums be used for distributed replication "bolted onto" SQLite?

>> (How) Should merkle hashes be added to sqlite for consistency? How would merkle hashes in sqlite differ from WAL checksums?

SQLite would probably still be faster over the network with proper Merkleization