When running large replication, the process takes quite a while. While running, it's a real black-box since there is no output at all. Could we support having some optional flag that outputs some kind of progress report? I guess easiest, we could support reading an environment variable like REPLICATION_VERBOSE or REPLICATION_DEBUG and if set to 1, we just print some debug information?
That way, this could be easily turned on CLI invocations only.