Problem is, messaging platforms in "the Internet" aren't interoperable. If I use service X, I usually can only talk to people that also uses X. So "the Internet

Problem is, messaging platforms in "the Internet" aren't interoperable. If I use service X, I usually can only talk to people that also uses X. So "the Internet" is mostly composed of silos. Silos are the reason that platforms get centralized in the first place: people generally enjoy using the same X as their peers, so they can communicate in a single platform.