I'm not sure if the product exists, but something that replicates a homemade setup would be amazing.
Think of a bundled camera(s) + raspberry pi + 1tb backup drive or whatever that you can only access over your own dedicated personal wireguard vpn (or tailscale, something like that), but sold as a retail bundle.
Of course, that would cut out all the SaaS/app data selling aspect so it seems unlikely to happen.