I would agree with everything my colleague said. Tractable but hard is a good way to think about this.
There are many benefits from this technology, as with any other, but an uncontrolled race, including between countries, is in no one's interest. There is no winning, ultimately, if superintelligence is built. It doesn't matter who does it; there will be no benefits. There are many benefits to a well-regulated, well-understood and well-controlled AI market. Doing so is hard, but the work has to be done.