>such "wear and tear" is not covered under warranty.
Surprising - this same issue has happened to me multiple times with multiple power bricks but fortunately Apple replaced them every time.
I am very careful with the power bricks, but I think it's a design flaw of the old integrated cable design and strain relief which didn't do what it was supposed to do. As I noted, each time I brought a failed brick in they replaced it under AppleCare.
The old magsafe power brick design would tend to fray and fail at the strain relief points - either the one next to the power brick or the one near to the magsafe connector. I've seen the issue repeatedly for multiple other users as well - users who are not rough with the power brick or the computer.
Fortunately the current USB C power bricks have removable AC and USB C cables so they basically eliminated the issue from the integrated cable failing at the strain release point.
Surprising - this same issue has happened to me multiple times with multiple power bricks but fortunately Apple replaced them every time.
I am very careful with the power bricks, but I think it's a design flaw of the old integrated cable design and strain relief which didn't do what it was supposed to do. As I noted, each time I brought a failed brick in they replaced it under AppleCare.
The old magsafe power brick design would tend to fray and fail at the strain relief points - either the one next to the power brick or the one near to the magsafe connector. I've seen the issue repeatedly for multiple other users as well - users who are not rough with the power brick or the computer.
Fortunately the current USB C power bricks have removable AC and USB C cables so they basically eliminated the issue from the integrated cable failing at the strain release point.