The issue lies in improper training. Even the best of medics under stress will have some problems applying a CAT. With an improvised TQ, it leaves the possibility for further injury (compartment syndrome) and even death. Not saying a CAT could not do this, but it reduces the possibility for errors. The military would rather teach a standard on these devices and keeping it on your person with any improvised technique as a backup. It isn't that it's not being taught, there isn't that much emphasis on it anymore. Oh and to answer the OP's question: In my STOMP II bag, I usually have 10 CATs. In my dismount M9, there's at least 4 on the outside with 3-4 more on the inside of the pack.