16TiB is not a problem. I have admin'd postgres databases larger than that. If you use good hardware (ECC RAM) and an error-correcting filesystem (ZFS) you are

16TiB is not a problem. I have admin'd postgres databases larger than that. If you use good hardware (ECC RAM) and an error-correcting filesystem (ZFS) you are generally good to go. Typically for postgres, DB corruption issues are isolated to single tables/indices, not the entire database. Sqlite's architecture might be a bit less "resilient" in this sense (I'm not sure, just guessing), but it also might have a lower chance of introducing corruption in the first place.