The solution approach of Plasma is extremely "pragmatic construction"; it does not intend to transform the only cashier station but instead directly opens a large "new market" with countless self-checkout channels beside it. This new market is the Plasma sidechain. Technically, there are two key points to achieve concurrent processing. $XPL @Plasma #Plasma First, it has a sharded architecture. Plasma is not a single chain but a tree structure composed of many sidechains. Your transaction and my transaction, if they occur on different sidechains, or on the same sidechain but are unassociated, can be processed in parallel in their respective spaces without interference. It's like you buying water at convenience store A while I buy bread at convenience store B; we can check out at the same time without any conflict.