Manufacturers are motivated to make products that can't be repaired so that a) customers will buy more frequently and b) the manufacturer does not have to stock

Manufacturers are motivated to make products that can't be repaired so that a) customers will buy more frequently and b) the manufacturer does not have to stock and supply repair parts. The latter is particularly onerous as the lifetime of the product increases. Only long-lived expensive capital goods have parts supplied for 20 or 40 years, and for some of these special custom order from third parties is the solution.