Hmm not sure which Apple products you were referring to. My trusty Mac mini and mbp runs fine after so many years… I just feel for displays, not many complained about quality issues across the board via many Mac forums. Sure they do have issues relating to camera and audio but were also fixed via software patches. That’s what made me confident with my purchase 😄

Apple Watch, iPad, iPhone (the newer models) are not repairable and non authorised repair shops don’t have spare parts to even repair the units….

Just be prepared to pay in the event it is out of warranty.