When its about list or delist a coin or token, its about exchangers authority. Exchanger have a full right to delist a coin or token for many reason and i dont think binance is a threat for crypto space because most coin listed are good project with working product
when there is a project that is not running and does not have a trade, I think it will be mandatory to dispose of the list of assets listed in their exchange. therefore an exchange must indeed make the best selection to become a requirement for an asset registered in their exchange.