Look at our old software from the past decades. Old archived documents sitting in some obscure presentation program like Harvard Graphics. Now imagine not being able to load that data at all, even though you have the save file and the program, because the licensing server literally no longer exists.

Now imaging a world 15 years from now where Adobe totally goes under due to competitors making much better programs. Their servers go away and now, and you can't even start your licensed software without running it through a debugger and trying to crack the license check.