Importance of backup!

Me: Did you make a backup power circuit
Masters guy: I will order soon
Me (a week later): Did you make a backup power circuit
Masters guy: I will order soon!

Today
Masters guy: I just blew up a diode in the circuit!
Me: Did you make a backup circuit?
Masters guy: I will order today!

(The backup was also supposed to be an improved version of the circuit)