PymcuProg is a Python utility to program AVR processors. It was mentioned that this program is a Microchip tool.
Using this tool it is possible to program all UPDI Based processors, usb-to-serial converter, using just 1 resistor.
In Arduino this interface is working for the new ATtiny series 0 and 1, and the AvrDx series
Since this is working with Arduino, it should also work with Amtel (of Microchip) studio.
Adding this programming tool, programming over a serial port, for all UPDI based processors would be great !!!