if I was looking for a computer for a college student, the 2017 MBA would still be on the top of my list..... incredibly reliable with long battery life, numerous ports, and great functionality in a light weight affordable package. The 2017 MBA will certainly be supported with OS upgrades for the next 4 years. Only real downside is the screen.....so what, it's a laptop, so you just rotate the computer or adjust the hinge to improve the viewing angle....a minor inconvenience compared to sharing a dorm bathroom with 30 other people on your floor.
BTW - I would not get an iPad Pro for most college student (exception might be someone majoring in the fine arts) because college students spend most of their time using a keyboard and mouse creating and editing large documents, reports, papers, and spreadsheets. If you are spending most of your time keyboarding, you should buy a device with an operating system optimized for keyboard and mouse input.