Relying on a centralized service can still be problematic. If nothing else it’s a central point of failure, even if you don’t have any particular privacy concerns due to the usage of end-to-end encryption. Signal also relies on Intel SGX for some of their privacy features on the server, which is somewhat dubious. AFAIK this is currently mostly used for contact discovery, which would otherwise be an even worse situation, but it has seemed in the past like they were interested in expanding this, though maybe that’s just all speculation. Regardless, my main concern with signal being centralized is that you have a lot less control over your chat. Signal can change on a moments notice and it’s all just gone.
Relying on a centralized service can still be problematic. If nothing else it’s a central point of failure, even if you don’t have any particular privacy concerns due to the usage of end-to-end encryption. Signal also relies on Intel SGX for some of their privacy features on the server, which is somewhat dubious. AFAIK this is currently mostly used for contact discovery, which would otherwise be an even worse situation, but it has seemed in the past like they were interested in expanding this, though maybe that’s just all speculation. Regardless, my main concern with signal being centralized is that you have a lot less control over your chat. Signal can change on a moments notice and it’s all just gone.