* Structured logging is far more powerful than plain text, but we lack tools to convert plain text logging code to structured, and lack tools to convert plain text logs to structured<p>* Logging in a large system is a tragedy of the commons. A few players spam the logs like crazy, and the rest often don't log enough. Logs, logs, everywhere, but not a line to debug.<p>* Logging tools do a very bad job revealing discrepancies in timing. i.e. did the gap between two events change?<p>* Very few tools are able to continuously ingest logs and then highlight discrepancies or differences in a log of interest. That could be lines that are different, have increased in frequency, or are absent. I have sed scripts to be able to compare good and bad logs in this way, but this is a last resort when nothing else helps.<p>*