Assuming there's a large drive, probably NVMe, with space enough to install multiple alternative operating systems. It would be nice to boot to a GRUB menu asking which to boot. It might also be able to offer eMMC vs SD options.
But I don't know if GRUB is at all compatible with ARM and u-boot. My guess is that if done right each GRUB choice could replace having u-boot for that choice. The GRUB installation might not know how to set that up, it might need doing manually.
But I don't know if GRUB is at all compatible with ARM and u-boot. My guess is that if done right each GRUB choice could replace having u-boot for that choice. The GRUB installation might not know how to set that up, it might need doing manually.