Hey! So for scaling it should scale quite easily with socket.io room’s implementation with Redis when required, and unless I’m having a hell lot of people on it at the same time it shouldn't be much of an issue given the small footprint.

For critical mass, this is why I’m developing features that are asynchronous (ex: notes) or app wide (ex: games that you can join with other users online no matter the website or page you're on).