It doesn’t really matter because it doesn’t change the point that people think they own digital goods when they don’t. GOG may have a more consumer friendly system in place but it doesn’t change what has happened with people’s music, movies, shows, games and music in games at these digital storefronts, where people have clicked “Buy X” and later on, it’s no longer in their libraries anymore. This has happened even when the business still exists and is still providing digital goods.
I know that. That still misses the point. The point of the law is to clarify that on digital storefronts that you make purchases for licensed digital goods, that you can’t imply to the consumer that they actually own those goods. It doesn’t matter if there is an offline installer. It doesn’t matter if you can ‘keep your installers forever’.