Fwiw my 2012 mbp still runs. Takes in plenty of dust working outside and on account of the plastic hinge turning brittle and falling apart years ago. Once every two years I will open her up and blow her clean again. Thats about all the maintenance she needs today. Ironically it has somewhat stronger specs than gps new m1 air, considering I also have 16gb memory, but then 1.5tb of storage and 2 operating systems.