My guess: in the old days when electricity was new, power conversion was done with Rotary converters which were basically a fused motor-generator. To change voltage you had different winding and number of poles. So if you were at 60 Hz, you have the magic of being divisible by a lot of numbers and you could easily go up down by common integer values.
Then when Europe was standardizing, they wanted to be all metric, and 50 was close enough to 60 and still could become 100 by doubling.
I don't know, those are just pure guesses.
I think when you come from the engineering/tinkering side of things, you like units with easy integer fractions (12 inches in a foot is really easy to work with at human scale). When you come from the science side of things, you like easy decimals and that's why metric wins there.
Then when Europe was standardizing, they wanted to be all metric, and 50 was close enough to 60 and still could become 100 by doubling.
I don't know, those are just pure guesses.
I think when you come from the engineering/tinkering side of things, you like units with easy integer fractions (12 inches in a foot is really easy to work with at human scale). When you come from the science side of things, you like easy decimals and that's why metric wins there.