What? Calling Kafka a queue seems to be a fundamental misunderstanding what it is as a tool. Why would you be polling in Kafka for real-time updates to a UI? That's not necessary at all, a topic subscriber will automatically pick up new messages and can send them via web socket. Kafka doesn't mean databases go away, so there's absolutely zero reason for any sort of issues submitting transactions from a user-facing app. It's almost like you're not really talking about Kafka.
He mentioned "or server push mechanism", aka websockets. I don't think they're trying to call kafka a queue, they're just talking about asynchronous architectures.
