I would really love this to be added to the article (or a followup), since it was my conclusion as well, but most readers are going to be thinking the same thing.

I'd also love to know how balancing the trade off of compute time between FHE and the bloat of storing large change sets affects latency for online and offline cases.

Perhaps, as with many things, a hybrid approach would be best suited for online responsiveness and offline network and storage use?

Admittedly, I haven't read the linked research papers at the end. Perhaps they have nice solutions. Thanks for that.