Mailing the story:
Billions and billions of...lines of proprietary code to go open source
Eric Raymond made the point years ago that most software is written for use, not for sale. Eric put the number at 95%; that is, 95% of all software is written for in-house use, rather than for sale. If he's right, and I believe he's not far off, then banks, manufacturers, retail chains, etc. are sitting on a massive gold mine of software.