I have to disagree on one thing only..
"planned obsolesce" is a fact not a myth,
not everyone applies this policy of course but there are alot of example out there proving this
the more evident one is for example to limit the life of a light bulb
Apple's use of pentalobe screws in their newer devices is an attempt to prevent the consumer from repairing the device themselves
Non-user-replaceable batteries
Smart chips in ink cartridges to prevent them from being used after a certain threshold constitutes "planned obsolescence"
when you design a board and you put capacitors in a place where the temperature is hot you know that the capacitor itself would last no more than 3 years. there are alot of triks to make everything with "planned obsolesce" in mind 😉
last example ... server grade vs consumer grade
