This is a fairly lofty and unrealistic goal. Unfortunately, the right for companies to keep their source code private isn’t going to go away anytime soon and if they were legally compelled to release binaries, the setup for a modern cloud based online experience is not for the faint of heart.

A more realistic goal would be to say that all products should be usable offline (with exceptions for impossibilities like an instant messenger or something)

If the online servers don’t exist anymore, there should be a path to functionality without them. For everything, given the rise of iot especially. If there’s a path to functionality without the online service there’s a path to preserving the game