Aren't both of those "powerful adversary" attacks equally valid against Signal, and really any digital communications platform? It depends on how accessible th

Aren't both of those "powerful adversary" attacks equally valid against Signal, and really any digital communications platform? It depends on how accessible this email metadata is compared to Signal traffic, and how big you'd have to be to be able to eavesdrop on it. IIRC this was even a problem for Tor, when there are too few users relative to the nodes being snooped on.