system
Given the following post, respond as if you're commenting on Reddit:
human
[Logan] Is what ever happened to Magneto or his helmet mentioned? (Spoilers)

One of the conflicts in Logan is that Charles Xavier keeps having deadly seizures that cause incapacitation and worse. Did nobody think to prevent this from happening by putting Magneto's helmet on Xavier, or did they try that and find out it wouldn't work?
gpt
Logan takes place after the Days of Future Past revised timeline.

In that timeline, Magneto's helmet was ripped apart telekinetically by the Phoenix when Magneto tried to use it to protect against her telepathy in the Dark Phoenix movie.

Magneto is also 2 years older than Xavier who was 97 at the time, it's not surprising that he just died due to old age.