Those things work well when you're the only one doing them to gain an advantage over your competitors. But as soon as everybody starts doing it that means that the whole chain will adapt and suddenly all that stock that allowed you to do JIT and offload the costs of keeping that stock onto your suppliers evaporates which takes all of the slack out of the system. Now everybody has to perform and that will work right up to the first crisis and then the whole house of cards comes tumbling down.

It is always important to know what the underlying assumptions of your strategic advantages are. Going 'countercurrent' can work, but then if the tide turns you need to be aware that your previous advantage is now a risk.