You might find a sort of contrary view interesting as well. In Poul Anderson's Boat of a million years, that I read recently, he discusses the idea that actually aliens and such like might not be particularly advanced. He argues that technology eventually hits the limits of physics and simply cannot go much further. He mentions a physicist who dreams of discovering something, anything that hasn't been discovered before but their AI describes that as diminishingly unlikely. Possibly a very real vision of the future and also a possible solution to the Fermi paradox.