> Made me wonder if it would make sense on these SoC targets to dynamically load a program from external storage and write into internal flash for execution, th

> Made me wonder if it would make sense on these SoC targets to dynamically load a program from external storage and write into internal flash for execution, then start running it without a reboot. There is less reason for this today because high-capacity, high write-count storage is cheap. But I have seen it done, e.g. in order to retrofit redundant firmware update schemes on devices that do not originally support it. A long time ago I looked into something like this for one of the devices I was working on at the time (the firmware was stored in the internal flash of the MCU, but was steadily growing, and we'd eventually run out of space to hold two copies; however, we also had a larger, cheaper, slower external flash that we could use). The write cycles cap of flash devices can make it a bad idea under some scenarios, but that's a decision you make on a case-by-case basis. ZOMG THIS IS FLASH DO NOT REWRITE IT is not exactly a clever design solution.