I've been programming for around 20 years, and I have difficulty remembering large parts of my life. Stuff with kids, other important events just don't exist for me. My wife tells me all about things we did, that I have no clue about.

I can, however, remember with painstaking detail obsolete API's, technical issues and little annoyances that I ran into 15 years ago writing software in languages that don't even exist anymore.