Besides the fact that they're actually fairly good at maintaining code/building tests, they don't get bored maintaining code like people do I'd say that's a fa

Besides the fact that they're actually fairly good at maintaining code/building tests, they don't get bored maintaining code like people do I'd say that's a far easier task than development (from the POV of a machine) because you already have a known "standard" to aim for, and there's much less need for 'lateral thinking'. Anytime you have a delta you can initiate responses (even incredibly minor ones) And you could send a proverbial army of them at any small regression or complaint for almost no cost.