I think those textbook algorithms make you think about efficiency. But all of them suffer from being short. In reality I design low level algorithms doing real business spanning 500 lines at minimum, and the point is to utilize and alter multiple of those textbook algorithms. Sometimes you need to add more operations in the middle, sometimes you need to extract the data from the middle of one algorithm and pass it to the others. But when you equipped with those knowledge about algorithms, you know what to do immediately instead of confusing.