What this misses, is that in any highly functioning teams everyone is important and in order for the "rockstar" to be the "rockstar" they need people to help keep the machines running and to support them. This is usually why a team that has a mix of both veterans and newbies works so well. Everyone can operate at their own level while learning and growing. Is the veteran a 10x when compared to a newbie? If you make up some metrics, maybe, but the veteran cannot do meaningful work without the newbs (think rock concert without all the supporting crew. could any band do their own concerts without all the supporting crew?)