I provided a detailed review of the benefits of SOA in this post: https://forum.opencyphal.org/t/port-type-safety-enforcement/1303/73?u=pavel.kirienko. The bandwidth concerns (along with the derived issues, such as timestamping and covariance) appear to be unsubstantiated, as illustrated in the OP post.
As for the other points, they are already covered in the OP post, and I see little value in restating them again.