I posted this comment on an older thread about the same topic: "If radio signals is the best way for us to detect alien intelligent life, and vice-versa, aren't

I posted this comment on an older thread about the same topic: "If radio signals is the best way for us to detect alien intelligent life, and vice-versa, aren't we doomed to keep quiet then? I mean, how long until we phase strong radio signals almost completely? I mean, has there been any growth in the quantity and power of radio signals since, say, the 80's? It's an honest question, since I don't know, but I see radio declining everywhere, except for, I guess, airplane and naval communication. What else am I missing here? Probably a whole lot, maybe someone could fill me/us in?"