It'd be interesting to see a setup where a Linux-capable SoC would run the Arduino application on a isolated CPU core with no interrupts handled, so you'd still have real-time guarantee for the Arduino app
It runs the Arduino app on a separate mcu stm32l4 I think. So you have the realtime as well, but what you describe is already possible with the pi and asymmetric multiprocessing using openamp and zephyr.
