Comment by cosmic_cheese

Not just wholesale crashes, but all sorts of misbehavior. For example, cheap WiFi/BT/ethernet can wreak havoc on your connectivity and out of spec USB peripherals can cause all sorts of problems. Both can bring sleep/power saving problems.

Most people using computers aren't technical enough to be able to discern these things, however, and many buy the cheapest thing on the shelf and so these subpar components persist.