Let’s suppose I do a project for industrial segment market using the Nextion display. How is it supposed to be upgraded in the field later on if I wanted to change some GUI elements? Unless I don’t see some obvious solution, the idea to change / reprogram SD cards in the back of the dosplay using some custom tools is a show stopper to me. Slow speed serial port update gets just marginally better in the age where complete applications are updated over the net. Any comment on that aspect?