A marketable limit order is strictly better: "I'll sell at the best price available, but no more than X% worse than the current price" vs. "I'll sell at literal

A marketable limit order is strictly better: "I'll sell at the best price available, but no more than X% worse than the current price" vs. "I'll sell at literally any price". In most cases, they give identical results, except in certain catastrophic cases where the limit order will save you (e.g., flash crash).