I am still on an i5 11" MacBook Air made of aluminum from Mid 2012 with 4GB RAM. Changed the battery twice, upgraded to a larger SSD once. I was considering buying a new laptop a few years ago, but that thing has served me so well despite falling to the ground unprotected about 3 times and being old. I do embedded and some web programming. I will use it until I am no longer able to start it up. And at that point, I will probably open it up and have a very last try at fixing it.