When the network is congested, you just click "Send" on your wallet and it's done, but actually the transaction is just queued in the mempool... I'm just someone who loves looking at charts, and sometimes I stare at that pile of pending transactions, feeling like rush hour on the subway: if the gas fee is too low, the next person cuts in line; if you wait too long, your wallet might "resend/accelerate" the transaction, and suddenly a string of replacement transactions appears next to the same hash, which can be pretty exhausting to watch. What's more annoying is that you think the transaction didn't go through, but in fact, someone else has already used it for an MEV strategy, and the slippage becomes even more obvious when you set it high. Recently, everyone has been interpreting ETF capital flows, US stock risk appetite, and crypto market rises and falls together, but I think it's more practical to first figure out whether your own transaction can be successfully included in a block... Anyway, I’m reducing my activity during congestion, and if I really need to act, I prefer to set clear limits and expiration times rather than wasting effort.