While laptops aren't made as well as they used to be back when they sold for $4000, all of my laptops from the 1990s including 386, 486 Pentium 1 and Mac Powerbook models, are still fully functional today except for their batteries.
About the only things that actually failed in 25+ years were two inverters and one CCFL bulb, but then I always treated them like the delicate things they are. Modern laptops with SSDs and LED backlighting would be much more rugged if it wasn't for things like underengineered hinges and flex cables.