Pretty much. Or at the very least: never rely on one vendor's proprietary implementation(s). Always have at least two in active use (though you can do somethin

Pretty much. Or at the very least: never rely on one vendor's proprietary implementation(s). Always have at least two in active use (though you can do something like using one vendor 95% of the time), and if/when one goes down make it your top priority to find another.