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
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