Exactly what I did, fifteen years later. I haven't programmed for anything but fun in ten years, but sometimes fun means C or dialects. It has a staying power in my mind that I attribute to the rigor both of the language and of K&R.

By contrast, I did Perl work for years, and went to script something in it recently. Quickly decided it would be easier to learn Python from scratch than to get my Perl chops back.