Having not seen anyone else for two years, Sarah is happy living a subsistence lifestyle in a world without people, yet she still bothers to shave her armpits.
At 21:50, the host says, "the simulation will be discontinued in one week.", but after a minute he says that there is an option to live in the abandoned simulation. If only the humans who chose option B are removed, that would not reduce the resources used in running the simulation. So practically, the simulation was not discontinued.
After the end of the world, roads can't be as clean as shown.
After the end of the world, psychologist's office can't be this clean.