The Sixth way
It is not only the hardware makers that are guilty, software too must take its fair share of responsibility of obstructing repair of potentialy servicable equipment.
The increase in processing power & storage that has been reqired to run both newer OS's & applications that bring new features of negligable benifit to the majority of users, forcing unnecessary upgrades if not in parts but in total.
The potential introduction of an unswitchable EUFI, walled gardens & other measures designed to "protect us!"