This post is relevant, and has more to say about the benefits of neighbors in approaching lightspeed travel https://www.lesswrong.com/posts/DWHkxqX4t79aThDkg/my-current-thoughts-on-the-risks-from-seti#Alien_expansion_and_contact
Apparently there’s an armstrong—sandberg paper that found that getting 99% of lightspeed is totally feasible with coil guns. So the benefits are mild.
This post is relevant, and has more to say about the benefits of neighbors in approaching lightspeed travel https://www.lesswrong.com/posts/DWHkxqX4t79aThDkg/my-current-thoughts-on-the-risks-from-seti#Alien_expansion_and_contact
Apparently there’s an armstrong—sandberg paper that found that getting 99% of lightspeed is totally feasible with coil guns. So the benefits are mild.