The escalation continues. I recently upgraded from U-lock+cable to U-lock+U-lock, the second being the aluminum RockyMount Carlito. It's only 40g heavier than the cable I've been carrying, can't be cut by wire snips, would require two cuts since both sides of the U have locking bars, and provides a 'two beefy U-locks, not fooling around, almost any other bike would be easier to steal' visual deterrent.