Perhaps your definition of professional is too narrow. I'm a professional writer (and hobbyist coder). I used a MacBook Air for four years before upgrading to a

Perhaps your definition of professional is too narrow. I'm a professional writer (and hobbyist coder). I used a MacBook Air for four years before upgrading to a MacBook Pro. My reasons for upgrading to a MacBook Pro were: (i) the better screen (which matters when you're looking at it eight hours a day), (ii) improved performance compared to the Air or the MacBook, (iii) the ability to drive a couple of high-definition external screens, and (iv) all the above on on a portable device that runs MacOS. Number iv is probably the most important reason: I prefer MacOS. If you construe "professional" as someone with high CPU and GPU processing demands, then perhaps I don't count. But that's a tiny market: most professionals who choose a MacBook choose it for the same reasons I did.