Even if some states break from the compact too late for the other states to back out in an election, the end result would still be fine. I'll use the 2000 elect

Even if some states break from the compact too late for the other states to back out in an election, the end result would still be fine. I'll use the 2000 election as a concrete example to avoid a more charged recent one. Presuming that 270 electoral votes worth of states had signed up for the compact before the election, and then a couple of them had defected "too late" for the other states to react, the end result would still be in keeping with the goal of the compact. At worst, a "partial compact" has no effect, and at best it still accomplishes the goal of the "full" compact.