Lets say I sell books and I sell frozen pizza. Books need to be sent via USPS since they are by far the cheapest. However, the frozen pizza can only be sent via next day air FedEx or else it will go back.
Now, you can imagine that forcing a customer to send the book next day air because the pizza needs to be sent next day air is a problem. So, can Magento allow the user to select shipping method per product?