The programme's stated approach was to develop no new technologies or systems and draw on equipment already available in other programmes. That could reduce risk at the component level. The unresolved question is whether the means of connecting those selected systems would themselves be new. A list of mature components therefore leaves an integration question to resolve for the particular ship.
Notable Point · 2:31:51-2:32:59
Proven systems still require integration
Selecting equipment already used elsewhere leaves a separate question about the systems needed to make it work together.