I have seen them used at Apple Stores attached to mobile credit card pos devices and thought that may have at least partially driven their decision to do another refresh in 2019.The iPod touch is a very popular device in retail business. It is small enough be carried around easily by retail employees and inventory workers. Combined with various scanner and credit card processing devices, it is a great choice. That is why Apple did not change the case during the last refresh. Companies wanted a plug-in replacable device.