I don't really see it as an entirely separate topic. It is still an abuse of rights. In this case, it is an abuse of ownership. If I make a purchase of a good, I should own that good. If the company later decides that they no longer want to support the services which support that purchase, they should be required to provide the opportunity that all purchased goods remain valid and operational. If we take a different good as a stand in, cars, a manufacturer may eventually decide to stop supporting a vehicle, but they do have to sell the component rights to aftermarket manufacturers (or at least make good faith attempts) when they drop support so people who own those vehicles have the chance to maintain and use them. I see this as no different than that. Their dropping of support means that products purchased are removed from use or function without the owner's consent.

And I know you are going to say "well the EULA says you don't own it and you agreed to it" which is precicely the problem we are arguing. Purchase should mean ownership and forcing people to agree to whatever you want is wrong. Legislation is required because no company will protect the rights of customers, that is the duty of legal systems.