An interesting speculation, as always. But the presupposition behind this is that biological evolution throughout the universe is convergent—that is, it will follow an inexorable trajectory toward something resembling our own technological civilization. I’m not so sure. Out of every species on the planet, only one—human—has evolved digital language based on the “software” of discrete phonemes and morphemes organized into noun phrases (denoting entities and categories thereof, real or imaginary) attached to verb phrases (telling others of their tribe where these entities can be found or what they are doing or should do).
No other being, even among our fellow simian primates, can do anything like this. Their communication is entirely analog and hard-wired in their genomes—whether a bird song, a whale song, or a bee dance to point toward flowers. And digital language was the foundation that enabled the vast variety of human cultures, only one of which—ours— went through a true scientific revolution (the ability to test and validate hypotheses reliably about the concepts and propositions we made about our world). And of course the explosion of discovery and technological innovation could not happen until the Scientific revolution! As Stuart Kauffman has often observed, there is nothing necessary or repeatable in our particular “run” of evolution, since possibilities proliferate with each new phase of innovation. He refers to this as the exponentially expanding “adjacent possible.” So it’s entirely possible, even likely, that ours is the only technologically advanced civilization in the entire universe.