If you really solve a problem well, you have solved it for anyone who can run that software, as long as they have the environment that you used. In "business language": if you do your job well in Programming, you lose your job. page 
Ward via matrix It helps to remember that Bob Martin's first career was as a preacher. The preacher is allowed considerable latitude to interpret history in the context of the sermon.
XP-Programmer - Kent Beck showed me Hyper Card which he first got his hands on it after joining Apple. It was called Wild Card then. I was blown away.