Why do Virginia-class submarines emphasize VLS more than Astute-class boats?
Short answerVirginia is a general-purpose attack submarine absorbing SSGN strike duties, while Astute was shaped more narrowly around the Seawolf-style hunter-killer mission.
NotesThe Royal Navy built Astute primarily as a peer submarine hunter, making its design philosophy closer to Seawolf than to Virginia. Virginia is a broader all-round attack boat and increasingly carries land-attack capacity because the US Navy does not plan a direct replacement for the four Ohio-class SSGNs. That force-structure choice explains why later Virginia blocks add large missile payload modules. Losing a single submarine's ability to launch roughly 154 tactical missiles removes a strategically useful concentration of conventional strike power.