Re Stop Killing Games: To be clear, there are definitely cases where companies use always online connection checks as a form of anti-piracy, killing any long-term preservation (or even ownership), but this seems like it has wide ranging implications beyond end-of-life scenarios.
DLC - Many games hit an authorization server to validate you have purchased that DLC. And to be clear, losing access to DLC you have paid for because the authentication server has been sunsetted sucks / may potentially even be illegal in some markets. But I don't see any proposed remedy - defaulting to No Authentication Response = authorized just means anyone can download the files from another install and pull their internet connection for access. You could presumably move the authentication step to a permanent account flag at the Steam / PSN / Xbox Live level, but that just moves the sunsetting issue up a level.
MMOs (or really any client/server interaction) - Much like RPGs, MMORPGs are a dying genre because MMO is an ingredient, not a genre, in a lot of games. And its unclear just how integral those server interactions are to many games - does any enemy in Destiny 2 compute anything at the client end?
Beyond the obvious MMO activities, there's been a slow but increasing push to move computationally advanced components off the client. To cloud based deformation going way back to Crackdown 3 to LLM AI voices today in Fortnite, the trend is steady to move these activities off the glorified laptop CPUs game consoles use. So what happens under this initiative? A lot of minimal fallback activities? What happens when all the decision making is cloud based (say, an RTS tthat uses LLM for its move decisions) - does that get released if its main (or any) innovation is dependent on a server connection?
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To be fair, there are definite issues with preservation and long term ownership when it comes to online-connected games. But as others (even in this very thread!) have said, the real issue is an industry-wide conflation of ownership vs license, if ownership even means anythig when we're dealing with computer files that can be copied and distributed at will, and not physical goods.