Errors can be recovered automatically sometimes but at the level at which you log them you don't know if that's going to happen. I therefore think this suggestion is not easy to follow.

Even if your libraries use nothing but exceptions or return codes you still end up with levels. You still end up with logs that have information in them that gets ignored when it shouldn't be because there's so much noise that people get tired of all the "cries of wolf."

Occasionally one is at a high enough level to know for sure that something needs fixing and for this I use "CRITICAL" which is my code for "absolutely sure that you can't ignore this."

IMO it's about time AI was looking at the logs to find out if there was something we really need to be alerted to.