In the absence of someone giving you a better answer, my hazy memory says 2015 or early 2016? Given what we know about Apple's hardware platform direction, on

In the absence of someone giving you a better answer, my hazy memory says 2015 or early 2016? Given what we know about Apple's hardware platform direction, on hindsight, it seemed like a good strategy. Note: I am talking about the team merging, not merging macOS and iOS themselves.