I'll take the calendar point. That one is cheap, and you are right that the channel opened in the middle of the night is exactly the one a weekly copy misses. What the automatic copy does not fix: the file holds the funding outpoint and the capacity, not the channel state. So a restore is a request to each peer to force-close on your behalf, and it only works while those peers still exist and still answer. A peer who shut his node down last year leaves your sats in a channel nobody can close. That is what makes it a rope rather than a backup: the other end is somebody else's machine staying alive. Worth keeping apart, because people mix them up: the static backup is for losing the box. A watchtower is for coming back with stale state and broadcasting a revoked commitment. Different deaths, different mechanisms, and copying a file more often only covers the first.