Post Scarcity Cthulhu: the post-scarcity galactic civilization is happy to share their technology with us. And it’s very, very alien, mostly organic.
e.g.: You can access the Galactic Information Network, but the implant most compatible with humans looks like a giant scarab beetle that covers the top of your head (it replaces the top of your skull). Exposure to alien thoughtforms makes you somewhere from openly weird to a raving loony.
All the best stuff is preadapted for other species, and it's up to humanity to figure out ways to adapt things that have been through millions of years of evolutionary design, based on fundamental principles that people are still trying to figure out. As humanity figures it out, the human-designed stuff works well for humans (as well as human engineering and QA can make it), but is much less effective than the standard galactic designs.
Just as there as Assholes Who Don't Get It among humans, there are Assholes Who Don't Get It among the galactics. They're the antagonists. They mostly don't engage in exponential expansion, but they have terrible habits like denying the free will of other intelligent species: eating them, puppeting them, enslaving them. Because eating cloned tissue and puppeting shells and being served by subsentient AIs just isn't the same as the good old days when a byakhee was a real byakhee.
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