This all strikes me as very similar to promise pipelining and distributed capabilities from an OCap system like E.

Any code sending an outbound request in reaction to a write is causally related and could be represented as a pipelined promise. The receiving system can then proceed in its work until it needs to "await" the incoming promise and can see whether it was broken due to a failure to persist some earlier write. This could also be handled at the network layer if the receiving system was external.

I'm pretty sure I remember Kenton announcing that Cloudflare Workers now supports something like (or exactly) object capabilities and promise pipelining and his knowledge/interest in such systems is already reflected in Cap'n Proto RPC.

Very cool stuff if you ask me!