Personally, I’ve never cared that much about person detection vs other bread & butter features (expanded shortcut actions, fully developed scheduler, etc.) and bug fixes (dimmed playback is still with us). Neither do I crave another recurring monthly bill in my life (CMC).
All of that said, I still believe this might be the cleanest solution to it all. Person detection processing & continuous recording remain on the same local LAN as the cams themselves. Another advantage is that it might limit future firmware upgrade needs to the DVR hub itself for new feature rollouts… as opposed to the need to upgrade each individual cam.