(1) The (11-inch) size is fantastic: you get enough screen real estate to see what you’re reading and writing, but it still fits into an arbitrarily small bag and is light enough that you can comfortably walk around all day with it. The death of the original tiny MacBook Air was a huge fail for apple
(2) CELLULAR CONNECTIVITY FOR GOD’S SAKE CELLULAR CONNECTIVITY. Yes, you can always hotspot your phone, however, that’s still not nearly so reliable as a device with its own connectivity, some providers still limit bandwidth there, plus the last thing I need is extra battery drain on my phone when I’m already stressed about it.
TBF, if Apple ever brought back the original MacBook Air with modern specs and with a cellular chip, I would just take gigantic buckets full of money and throw them in the general direction of Cupertino until I got one, like, instantly. And there are definitely still compromises—-as an academic, I’ve been meaning to just write a command line front end to zotero and fling it onto a digital ocean server or something, because its iPad app is so godawful. But on the whole, I still reach for my iPad much much much more than my MacBook, for those two killer features.