Concrete may have a place on spaceships and space stations because, due to containing a lot of hydrogen, it is a great material for slowing down the fast atomic nuclei in cosmic radiation that are harmful to astronauts. Against gamma radiation lead is optimal, but against particle radiation (the most prevailing and risky kind in space) you want something with lots of hydrogen nuclei (protons) in it. In lead the fast cosmic radiation nuclei would knock lose showers of neutrons which would be even more harmful to astronauts than the fast nuclei themselves, but from the protons they rebound, transferring a substantial fraction of their kinetic energy to them, being effectively slowed down. Thus it has been suggested that future spaceships should either store their water supply as a hull around the habitat, or else use a layer of lunar concrete or have active shielding which deflects cosmic radiation particles with magnetic fields (or a combination of all these).
As for the new version of R60, well, Brianna already lauded herself over making everything look like it was doused in neon paint, she sees this as a great improvement. Someone said the iOS version was too dark, so the obvious course of action was to crank brightness, contrast and colorization up to the max.
