Another thing people tend to overlook about server-side rendering tends to be the battery usage on mobile involved in keeping radios alive for things that would otherwise not require it. Mobile OS's go through pains to keep battery performant by turning off hardware when not in use, but constant server-side view round-trips de-optimize that capability.
You still have a roundtrip. The question is can angular use significantly reduce the bandwidth required. In my, limited, experience of any major js rendering on the client the answer is most likely no it won't.
