Easy: doing so would cost too much money, for not enough profit gain.

Aka, there isn’t enough competition between airlines

Honestly? Mac laptops are really good right now. The move to ARM based processes has gone… stupidly well. Had you asked me in 2019 if I thought ARM was ready for the main line I would of laughed at you, as would most IT enthusiasts.

But Apple did it, and the battery life savings they’ve managed are killer. Meanwhile Windows laptops can barely get sleep right.