My grandmother with a 2015 27" iMac and a 2017 12" Macbook just replaced both devices with a 13" Macbook Air and a 27" Dell USB-C monitor. She would have preferred buying a MacBook Air + a 27" iMac, but Apple stubbornly refuses to make one for some reason. The studio display has an A19 chip in it already (more powerful than a MacBook neo!) why not just make it run MacOS?