[lukifer]

Current model designs, yes; but the series from roughly 2009-2015 (and the 2011/2012 models specifically [0]) are some of the most repairable and hackable models they've made: pull the bottom panel off the Unibody frame, and all the parts are laid out. Swap RAM, replace the optical drive with a 2nd hard drive, replace the battery, fans, whatever.

Whether the "sealed-airtight-with-glue" patterns of modern Unibody designs are truly necessary (or desirable) to achieve design goals of thinness and weight is hotly contested. :)

[0] https://www.ifixit.com/Device/MacBook_Pro_15%22_Unibody_Late...