> By contrast, if I use a true P2P solution, I never need to do a DNS lookup. My chats in Signal can't be disrupted by a change in MX records. I don't disagree

> By contrast, if I use a true P2P solution, I never need to do a DNS lookup. My chats in Signal can't be disrupted by a change in MX records. I don't disagree with your general premise but Signal is not decentralised at all, and I'm pretty sure they don't hardcode the Signal API server IPs into their binaries so you still depend on DNS (plus their centralised servers).