L2? I'm hot L1 material, dude. But I like your and OP's analogy. Also, the productivity claims are coming from the guys in main memory or even disk, far remove

L2? I'm hot L1 material, dude. But I like your and OP's analogy. Also, the productivity claims are coming from the guys in main memory or even disk, far removed from where the crunching is taking place. At those latency magnitudes, even riding a turtle would appear like a huge productivity gain.