ag is not "exactly like" ack. There are features that ack has that ag has chosen not to replicate. ack is also more portable. That's not a knock on ag at all

ag is not "exactly like" ack. There are features that ack has that ag has chosen not to replicate. ack is also more portable. That's not a knock on ag at all, and if ag fits your needs, then by all means use it.