Regarding point 5 (Antimatter might fall up.) Today we know little bit more about antimatter-gravity relation[0][1]. It looks like, matter and antimatter beha

Regarding point 5 (Antimatter might fall up.) Today we know little bit more about antimatter-gravity relation[0][1]. It looks like, matter and antimatter behave in the same way under the influence of gravity. So antimatter does not "fall up". [0] https://home.cern/news/news/physics/base-breaks-new-ground-matter-antimatter-comparisons https://home.cern/news/news/physics/base-breaks-new-ground-m... [1] https://www.nature.com/articles/s41586-021-04203-w https://www.nature.com/articles/s41586-021-04203-w