Consider the infrastructure you're talking about. What parts of the game service would
need to be implemented with micro services and/or calls to a cloud computing and storage? It would be matchmaking, storefronts, news updates, etc.
Running a single dedicated server on a home computer to play with whatever community you've curated requires none of these. Any sane game server architecture would already be essentially a single executable since you want performance and synchronicity within a single "match" or "world".
You say most games won't be able to release server software. Can you provide an example of a game which could not possibly be disentangled from its cloud architecture? I'm having trouble thinking of any