Right now POL server can use only one processor core. Its not scalable. And make limits to quantity of clients and possibility of server.
it will be better if POL server can use all processors that we have in the server. I see IPC as an implementing this function

or as an implementing - a few processes of POL servers with different roles.
for example:
World ( world Save/Load/Backup )
Game – game server
Network - (keep connection, crypting, packet parsing)