Why a Mark 41-equipped Renown might retain British missiles

Why not adopt Standard Missile when fitting Mark 41 launchers to the rebuilt Renown?

Standard Missile remains an option, but commonality with the rest of the fleet is the reason offered for retaining Aster and CAMM.

The suggestion to adopt Standard Missile follows the decision to use Mark 41 launchers in the hypothetical rebuild. The response leaves that option open while favoring missiles shared with other British ships. CAMM is compared with ESSM to illustrate the problem of giving one vessel a different equivalent from the rest of the fleet. Aster is also proposed on commonality grounds, though the exchange establishes no completed integration for this imagined fit.