Why would they not include the inter-satellite linkage capability? That doesn't make any sense, given that was a solved problem in the Iridium constellation 20 years ago. That was a huge benefit of Iridium, in that it didn't have to rely on the "bent pipe" of just relaying data between a client and a ground station within the same coverage area. It was literally, "if you could talk to one satellite, anywhere in the world, you would have service".