> Read-only assets are the easy part, which was my original claim.
I don't think this is true at all given the volume. With that kind of scale everything is hard. It's just a different sort of hard than contended resources. Hell, even that is as "easy" these days with CRDTs (and I say this with dripping sarcasm).
Asset volume is just a price issue in these days. You can reduce the price by using clever caching, with programming language choices, or higher compression rate.. but in the end it is not a real problem anymore in the overall infrastructure architecture. Read-only assets can be copied, duplicated, cached without any worries that they might need to be re-synced soon.
I don't think this is true at all given the volume. With that kind of scale everything is hard. It's just a different sort of hard than contended resources. Hell, even that is as "easy" these days with CRDTs (and I say this with dripping sarcasm).