“Most of the world’s video games from close to 50 years of history are effectively, legally dead. A Video Games History Foundation study found you can’t buy nearly 90% of games from before 2010. Preservationists have been looking for ways to allow people to legally access gaming history, but the U.S. Copyright Office dealt them a heavy blow Friday. Feds declared that you or any researcher has no right to access old games under the Digital Millennium Copyright Act, or DMCA.”
There’s often no in any way complete source code after 25 years.
Media degrade, get forgotten hell knows where, get occasionally destroyed.
All things that can be prevented in the future if you start today.