I'm not sure if this approach can really work. What I definitely would like to see is a requirement to preserve a working VM containing source code, assets and

I'm not sure if this approach can really work. What I definitely would like to see is a requirement to preserve a working VM containing source code, assets and build tools, set up to compile everything without an internet connection. It'd be much more useful to have than old binaries when all this stuff eventually becomes public domain.