Charging bricks disappear. Often. Kids lose them, suitcases and hotel rooms eat them, your co-workers steal them. The cheap replacements you buy at the gas station on the way home break after a few weeks and charge at a glacial pace.
And Lightning cables? Mostly the same story. Unless they wear out before they have time to disappear. Third-party replacements never seem to last long. They break, the jackets slip off the port adapters, or they just stop working. Even the authentic Apple brand cables have a bad habit of failing right where the cable meets the Lightning adapter.