that comes down to a difference in philosophy i think… signal have detailed their reasoning for not making signals servers decentralised and self hostable, and i don’t disagree with some of them… i think everything is a trade-off, and decentralisation has scaling and usability issues
signal has done a pretty good job of creating a platform that’s much much better than alternatives in a package that’s consumable by the general public
i’m not sure that something that’s more like matrix, or xmpp, etc could do that
it might be theoretically and technically not quite as perfect, but its impact on increased privacy across the globe has been far larger because they’ve made some of those compromises