[zdw]

They probably have contractual restrictions - agreements to help fight against unauthorized copying, or to protect the copyrights of people who create games on the system.

And in general, most console systems are a serious bundle of hacks, mostly tolerated by programmers by the sole fact that you can rely on every system to be identical.

[djsumdog]

Not to mention a lot of the information me be lost or on archives servers/backups/tapes engineers have long forgotten about.