Twice the bits, twice the fun!

$ dpkg --print-architecture
amd64

I guess it was time for me to finally join the 21st century!

The process was not as painful as I had feared, but not nearly as painless as I would have hoped either.  (Still, it wasn't much worse than what I've endured over the years with a half-multi-archified setup.  I probably would have spared myself a lot of trouble by switching much earlier.)