Re: Wonderful, have one of these...
"all you need is two"
To do useful work on each other, yes. But what about spare parts? Just like a human body constantly replaces it's original cells, they would need a constant supply of spare parts. Judging by current state of tech, each android would need anything from 3 to 10 extra bits for every 10 years of operation, not to mention consumables like oil etc.
And most probably would fail in the end not because they've run out of incredibly complex state-of-the-art limbs, unbelievably advanced processors or portable fusion batteries, but because someone forgot to re-order a couple of 10p washers
Biting the hand that feeds IT
