It wouldn’t work. Strict back-to-front boarding means that only two people can get into their seats at a time in the entire plane — parallelism is lost. If a si

It wouldn’t work. Strict back-to-front boarding means that only two people can get into their seats at a time in the entire plane — parallelism is lost. If a single person is slow, the entire plane waits. You need a more scattered order for good performance.