Smart call, realistically I expect that most of the time, it would keep at least 30 days of daily logs.
However, it's possible the script is set to run manually, or monthly by cron job, in which case the "delete anything older than 30 days" would delete everything.

Smart call, realistically I expect that most of the time, it would keep at least 30 days of daily logs. However, it's possible the script is set to run manually, or monthly by cron job, in which case the "delete anything older than 30 days" would delete everything.

Yes, exactly. For the vast majority of users, the change would not make any difference, but my friend pointed out that he had no logs at all after setting up the cron job to run only once a month. (Why? Long story. Short version: he didn't want to update the F/W right away, so he set up a 60-day postponement with a once-a-month cron job).