If I have to later see every dumb thing I let within ten feet of my IDE window while working, I'm going to set the computer on fire and code pen on paper for later transcription.
Ha ha... yes, it sounds painful but imagine you come across a function that you don't fully understand. You can highlight it and watch how that code evolved. The code will be animated very easily (compared to trying to reconstruct the history from some VCS). Most people will never watch (or care about) you writing code but sometimes it may be very useful.
