I remember during one interview the PHB asked me if I liked to download stuff to my PC to experiment with new gizmos. I replied that I did, but that I prefer to have one "production" PC to get regular work done and a separate "experimental" PC that can be rebaselined if the experiments mess it up and/or to not cross-mix experiments. (Active-X was the "big thing" at the time, which should be enough to explain my caution.)
Anybody with experience will agree this is the rational way to do it. However, this was a start-up and they had no money for double PC's. (Maybe I should have offered to buy my own spare.) My "kind" wasn't welcome. The details of reality bothered them:
Sounds like what really happened was they gave you an opportunity to say something interesting about yourself and demonstrate some camaraderie and some love for the field, and you instead bored them with unnecessary details. They may have viewed that as a failure to communicate clearly. It's a problem many programmers have. They give impressive-sounding non-answers.