[merbanan]

Arm based devices have an early boot menu accessible by holding the "a" button. From here boot with fail-safe defaults.

[monocasa]

Arm based devices are not consistent enough with their bootloader to allow such a thing.

[merbanan]

Broadcom arm-based devices should have it.

[monocasa]

The raspberry pi is a broadcom arm-based device and doesn't have it.

Perhaps if you listed a specific product segment, that might be more enlightening.