If you were a Mac user before Sierra, you may have been familiar with browsing logs to check on things like Time Machine backups. However, with the introduction of the Unified log in Sierra, this became much more difficult. The Unified log records entries in a compressed binary format, making it inaccessible to the casual reader. Furthermore, the log files are only kept for a limited period of time, and entries may be censored for privacy reasons. This has led to difficulties in accessing and understanding log entries in the macOS. Additionally, there is debate over whether certain log content should be revealed or kept private.
https://eclecticlight.co/2023/10/07/sonomas-log-gets-briefer-and-more-secretive/