That's not entirely accurate. While the aptly named audit log does go way further back than the event log (so it's apparently still possible), it merely tracks configuration changes, and has nothing to do with device events.
Today I experienced how useless the AMP Device Event log has become. I went to investigate a major event that happened sometime tonight but lo and behold, there was next to no information available. The event had apparently caused the event log to max out, and instead of rolling over, it decided to start fresh. So now I'm left with a log of 287 useless lines.
To add insult to injury, this occured at 04:02 AM, 13 minutes before the nightly backup, so whichever awkward workaround I try, I'll have no clue as to what happened tonight. That didn't go over well with my boss...
Seriously, guys - what gives?