I'm just asking cause i know some other consoles have such things.
- NDS can boot GBA cart by holding B on boot.
- 3DS can load update safe mode on boot.
- Wii u can load VWii by holding B on boot
- Playstation 3 has safe (recovery mode) using a combination of beeps on the power button
- Psvita has one similar to ps3
- Ps4 i think does have one (someone confirm this)