The logs are raw operation logs that only have meanings internally (for example, adjusting column width, adding a filter). The logs are designed for data recovery when the system crash and restart.
For user level tracking, you can use the activities log.
Adding to @daniel.pan’s comment: SeaTable 4.0 does not change
the scope of logged activites,
the max. number of log records, and
the retention period of the log.
The new limit is merely relevant for the display in the frontend.
The base log is only retained for a limited period of time. When the operation log is cleaned - the intervals vary between SeaTable Cloud, SeaTable Dedicated and SeaTable Server - all entries in the base log older than the retention period are removed. This has not changed since SeaTable 1.0.