> There's no way for anyone that doesn't have an Apple product to participate in an iMessage conversation. In general there's no way for people to use platform

> There's no way for anyone that doesn't have an Apple product to participate in an iMessage conversation. In general there's no way for people to use platform-specific apps without being on the platform. Are Windows-only programs anticompetitive? Are Playstation-exclusive games anticompetitive? I don't think they are and iMessage is no different.