AppSync makes it easy to do WebSocket subscriptions (even if you aren't familiar with GraphQL). With our latency improvements on the event bus and WebSocket publishers and consumers, I think there are some really compelling architectures we can build.
Events stream in from a WebSocket client to the bus, consumers on the bus react to those events and process them, and then emit events back to the bus that are picked up by the WebSocket client. This removes all of the tight coupling between frontend and backend that typically happens.
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