none of the rust-based minecraft server have enough functionality implemented to use them for survival, maybe for some minigames but that's about it. Pumpkin has gotten far out of the many[1] but there's still lots to be done.
These game servers are really the perfect use case for agents. Would anyone really care that much about code quality if the server works fast and reliably?
The number of implementations and the lack of success suggest that it is a genuinely hard problem for humans, and "agents" are not going to magically make it simpler. Unlikely that humans abandoned their projects (or failed to band together) solely because of their desire for code quality.
