I still have my old code around, even though in many cases, I don't even know how I could compile them and can't be bothered to investigate. I found some old Amiga code I had written in 1986 or so. I also can't compile it, because I lost the second of my three dev environment discs. Still I like to keep them, and I even look sometimes at it, and there are some memories connected to it.
I was even surprised to see that even back then, I already adopted some good coding conventions I still maintain today, because I would have expected that the code is really bad and realized that even from todays point of view, it was not so bad after all.