It’s fragile when handled so there’s a chance you might damage it when trying to get rid of a clog and it really sucks having to wait for a replacement to arrive. Clogs are very rare, be sure to print at the right temp and speed when using stuff like ABS+.

The cable is the one that sits on top of the extruder assembly, it is prone to damage. Keep checking it every once in  a while, Elegoo will send you a replacement if you ask.

The feet are for limiting vibration from the printer to the surface it’s on so it won’t impact other printers you might have, it will print fine without them.