Time Machine has a reputation for silent failures and corruption issues that have frustrated users for years. Network backups (to NAS devices) use sparse bundle disk images that are notoriously fragile. A dropped connection mid-backup can corrupt the entire backup history, not just the current snapshot. https://www.google.com/search?q=time+machine+corruption+spar...
Time Machine sometimes decides a backup is corrupted and demands you start fresh, losing all history. Backups can stop working without obvious notification, leaving users thinking they're protected when they're not. https://www.reddit.com/r/synology/comments/11cod08/apple_tim...
The shift from HFS+ to APFS introduced new bugs, and local snapshots sometimes behave unpredictably. https://www.google.com/search?q=time+machine+restore+problem...
The backup metadata database can grow unwieldy and slow, eventually causing failures.
https://www.reddit.com/r/MacOS/comments/1cjebor/why_is_time_...
https://www.reddit.com/r/MacOS/comments/w7mkk9/time_machine_...
https://www.reddit.com/r/MacOS/comments/1du5nc6/time_machine...
https://www.reddit.com/r/osx/comments/omk7z7/is_a_time_machi...
https://www.reddit.com/r/mac/comments/ydfman/time_machine_ba...
https://www.reddit.com/r/MacOS/comments/1pfmiww/time_machine...
https://www.reddit.com/r/osx/comments/lci6z0/time_machine_ex...
Time Machine is just garbage for ignorant people.