Why do x86 CPUs only use 2 out of 4 rings?

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Music by Eric Matyas
https://www.soundimage.org
Track title: Hypnotic Puzzle4

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Chapters
00:00 Question
00:30 Accepted answer (Score 34)
06:35 Thank you

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Full question
https://superuser.com/questions/1063420/...

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Tags
#cpu #operatingsystems #privileges

#avk47