Plugs are functions, basically … so they can’t really behave like genservers.
Why would you add a genserver for each plug though? Wouldn’t one be enough? It would be a bit more efficient (less message passing between processes, the webserver’s and your genservers’).
But I would probably go with the :code.load_binary/3 approach (you can see how it works in the fastglobal library), because calling genservers might result in a bottleneck.
