I had this crazy idea to write an MMO server using Seastar with ScyllaDB and try to fit a huge isometric RPG shard in one server. It seems that modern servers could handle that load and have some interesting possibilities with a unified server. Kind of makes you wonder what the possibilities with text MUds would be if you dedicate more server time to player experience and game systems. Things people would have liked to do back in the day with open worlds might be more possible now.