3 Body Problem has an interesting take on this. Faster than light travel is not possible but communication is, meaning we’re anxiously preparing for an alien war that won’t happen for 400 years but they can see everything we do in real time thanks to quantum entanglement.
Good series, I always recommend the books but haven’t seen the show yet
I haven’t read the books, but I did watch the show… I enjoyed the first half, but the second half had so much implausible bullshit that I couldn’t really recommend it. I mean, the first half also had crazy impossible tech - but I feel that’s ok because its part of the setup premise. The stuff I didn’t like in the second half was more implausible decision making and strategising (and also implausible uses for impossible tech).
In any case, I really feel like they wasted a strong setup. I was disappointed at the end, and I’m not intending to watch the next session.