Macbooks are made of rigid aluminum and have incredibly tight tolerances especially in the 2016-2019 era. There is almost zilch room between the display and cha

Macbooks are made of rigid aluminum and have incredibly tight tolerances especially in the 2016-2019 era. There is almost zilch room between the display and chassis when closed on butterfly models. Apple literally has a support article telling you not to use a webcam cover more than 0.1mm thick because you could break the display [0] and I've heard stories of similar problems with crumbs. They also had really poor cooling for the chips Apple stuffed in there especially for the i9s, to the point IIRC the 2018 i9 benchmarks slower than the i7 in longish workloads due to thermal throttling. And the butterfly keyboards are a known disaster prone to breaking. While the M1 models have been an improvement, 2016-2019 were particularly not great. [0] https://support.apple.com/en-ca/HT211148 https://support.apple.com/en-ca/HT211148