huha wrote:I did multiple tries and pressed the back button, center button, top and left button when starting, but no success on dual boot.
This would be a feature I would like to have for the same reason (as David mentioned), too.
I understand you have right now other priorities, but for the longer term this would be great.
It's not only a matter of priorities. I know just a tiny bit about Wifi Routers which use embedded Linux and I assume the internal memory layout of the EV3 is the same. At least in case of the routers, the bootloader is usually kept in a different area of the internal memory, separate from the actual firmware. But it's very risky to update the bootloader because if that update fails the device is completely useless. As long as the bootloader is intact, the bootloader usually offers possibilities to recover from a failed firmware update via a serial cable. So even if we had a modified bootloader right now, we would not recommand everybody to update their EV3s.