Because Cidurial separates writes (commands appended to a store) from reads (SSE-connected pages subscribing to commands/events through pub/sub), any number of clients listening on the same channel see updates in real time. Demos: a Ruby-LLM chat app with multiplayer behaviour, a cinema seat-booking app where one user's selections appear instantly as unavailable for others, and streaming progress bars with activity feeds — no special per-feature code required.