These are all the different parts that come in a Time Capsule, that you otherwise forfeit with the Extreme. So it's up to you, wise user, to figure out which Wi-Fi droid is right for you.

AirPort Time Capsule A1470 Repairability Score: 8 out of 10 (10 is easiest to repair).

This is a no-brainer, since it's basically the same thing as the AirPort Extreme in terms of repairability.