We’ve had them here in Phoenix since before the pandemic. They operate just like Uber, except they’re cheaper and there’s no driver. You can sit in any seat besides the driver seat, and store items in the trunk of the vehicle. You can pair your phone with the car and play your own music on the speakers. Pretty good experience all things considered. The cars are pretty good at finding a place to stop and load/unload passengers, but sometimes they will drive right past you when finding a place to park and you have to walk 10-15 feet to the car.
There are several factors to consider when choosing materials in a nuclear plant. For things that aren’t in direct proximity to the reactor core, neutron activation (becoming radioactive) is less of a concern. Aluminum produces hydrogen gas when exposed to boric acid, which presents an explosion risk. Certain chemical compounds can cause corrosion to plant equipment, even a Sharpie marker could corrode a valve or pipe and cause issues over the 50 year life span of a plant.