Yes, that is along the lines I'm thinking, but for processes rather than web requests. I don't know enough about Arc to know if the server still has everything

Yes, that is along the lines I'm thinking, but for processes rather than web requests. I don't know enough about Arc to know if the server still has everything in memory between requests or not, and if it would survive a server restart, but certainly the Racket example is serializing the state so pretty much what I was thinking, yes. Thanks!