Ah! Thanks! I forgot to mention passive cooling. I am old enough to receive the heat of a new notebook. This is when "mechanic physics" tend to zero.

I would add that my MacBook Air received an smoothie of strawberry, mango, and orange over its keyboard and also fell off a few times from more than a meter.

BTW, I don't consider myself an Apple fan but really appreciate different form factors and real innovations. Hope others to follow. I think using several operating systems opens your mind.