I think communicating without essentially conquering the Hubble volume is still an interesting question. I would not rule out a future human ethical system that restricts expansion to some limited volume, but does not restrict this kind of omnidirectional communication. Aliens being alien, we should not rule out them having such a value system either.
That being said, your article was really nice. Send multiplying probes everywhere, watch the solar system form and wait for humans to evolve in order to say “hi” is likely to be amazingly cheap.
I think communicating without essentially conquering the Hubble volume is still an interesting question. I would not rule out a future human ethical system that restricts expansion to some limited volume, but does not restrict this kind of omnidirectional communication. Aliens being alien, we should not rule out them having such a value system either.
That being said, your article was really nice. Send multiplying probes everywhere, watch the solar system form and wait for humans to evolve in order to say “hi” is likely to be amazingly cheap.