[mistermumble]

Not to mention that once this is done in the US, what is to prevent other governments in countries where Apple does business to compel Apple to do the same?

China (or Russia or Germany or whoever) could force Apple to backdoor phones used by CIA informants in that country.

[fredsir]

And the fact that who is to assure that Apple doesn't leave one or multiple bugs around that makes the compromised OS not so tied to a single device as they meant it to be?

It's a ticking bomb, man.