I'm sure I'm missing a lot, but the paper is proposing CRDTs (Conflict-free Replicated Data Types) as the way to get all seven checkmarks. That is fundamentally a distributed solution, not a centralized one (since you don't need CRDTs if you have a central server).

And while they spend a lot of time on CRDTs as a technical solution, I didn't see any suggestions for business model solutions.

In fact, if we had a business model solution--particularly one where your data is not tied to a specific cloud-vendor--then decentralization would not be needed.

I get that they are trying to solve multiple problems with CDRTs (such a latency and offline support) but in my experience (we did this with Groove in the early 2000s) the trade-offs are too big for average users.

Tech has improved since then, of course, so maybe it will work this time.