A dispatcher must know whether a driver is actually available before creating a video room and issuing a scoped token. That constraint changes the usual push-versus-polling answer: use a realtime channel for presence transitions, keep polling as reconciliation, and treat the database as the auth...

Source: [Dev.to](https://dev.to/peregrineshaw9645/nodejs-realtime-channel-vs-polling-logistics-notification-delivery-cost-and-complexity-32gp)

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