But if they break you're in for a world of trouble, and you will in one go end up offsetting a good chunk (or more) of what you saved up to that point. In a way this is the result of designing things to outlast their warranty, once the warranty period is over anything that still works was essentially overdesigned. Fortunately for cars and other high ticket items the secondary market will punish brands that are playing it too loose and too fast but I've seen pricing for for instance headlight or taillight assemblies that make you wonder if there is an error.