Why so slow - I can dig faster than that - perhaps 3 to 6 inches, with a hand shovel, depending on the soil, in a single minute?
Granted, I slow down quickly, as it gets deeper. The deepest hole I've dug is probably a couple of feet deep. Nothing compared to your couple of miles.
Which is the point behind my sarcasm ... the deeper you go, the harder it gets. Going 100 miles deep is pretty obviously more than 50 times harder than going 2 miles deep.
And one more thing I'll grant .. you were probably speaking a bit tongue in cheek as well. Truthful about how deep you've dug, but tongue in cheek about the implication that this meant we could go 100 miles down anytime soon.
Problems on top of problems, plus a death.