But, to reply: yes, many organisations have fully functional, well-debugged logging infrastructures. A lot of them also use binary log storage, and have been for over a decade, and are more than satisfied with the solution.
Both rsyslog and syslog-ng have been able to assist with setting such a thing up for about a decade now.
> Where are the rsyslogd and syslog-ng competitors to systemd's journald? Where is the interoperability? Where is the smooth, useful upgrade mechanism?
The journal has a syslog forwarded, but both rsyslog and syslog-ng can read directly from the journal. Interoperability was there from day one. Smooth upgrade mechanism took a while to iron out, but it's there now, too.