Maybe it’s a good idea for programmers or DBAs. What if you could have all the code you'd ever written?
Who knows, maybe your employer is already recording your every keystroke and video recording your every movement at work. We also have Google bookmarking all your website page views and the NSA archiving all your phone conversations and email for posterity.
"Do not seek to follow in the footsteps of the wise. Instead, seek what they sought." - Matsuo Basho