That explains why the Nano Every Tech Specs are from the ATMEGA4809. So, if it's all about the focus, if one were to remove the 4809 just have the SAMD11, could the SAMD11 theoretically do everything the 4809 can? Specification-wise, the SAMD11 seems superior, though the only major difference to me is the processor, with the SAMD11 being ARM-Cortex-M0 and the 4809 being AVR. If all the SAMD11 is doing on the Nano is acting like a USB-Serial interface, it kind of feels like it's being underutilized. Could there be another reason for this dual architecture?
On that note, if you were to develop your own Nano Every, does the SAMD11 have to be pre-programmed in order to make it compatible with Arduino programming software, or do you have to pre-program the 4809? How would you do so via a bootloader?