> I can't imagine this not being overhauled going forward.

On which end, Apple or Signal? Because neither Apple nor Google will overhaul this behavior, the FBI asked for it directly: https://arstechnica.com/tech-policy/2023/12/apple-admits-to-...

This is different than push data, which already does not contain any content or metadata in Signal. This is about local OS caches, whereas for push notifications Signal only sends a push saying “message received” which wakes the device up and triggers the device to pull the message from the server over the regular e2e encrypted path.