The types of transactions that actually make sense to perform depend heavily on a network's block time. When settlements take ten minutes to process, everyday microtransactions simply lose their appeal. Nobody wants to wait that long for a basic two dollar purchase to clear, because the time wasted ultimately outweighs the monetary value. However, an infrastructure that takes only fifteen seconds to finalize a payment means everything is confirmed before you even leave the checkout counter. Therefore, swift processing should never be viewed as a mere luxury. It is the core element that defines exactly what a blockchain can be used for in the real world.

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