An increased exposure to radiation something brings one extra fingers, toes, limbs, etc, and since base-10 was useful due to the number of fingers we used to have, which was 10. However, at a certain point of time, the number of people who have 10 fingers will decrease, due to increased exposure to radiation, which might lead to the base-10 system being changed.
I’ve never even seen one in practical use in Dubai. The most I’ve seen are prototypes of lab designs.