An odd base is better in the sense that it doesn't need the weird "round to even" and "round to odd" rounding modes (https://en.wikipedia.org/wiki/Rounding#Round_half_to_even) to do unbiased computations when computing with fixed-width numbers.
That would mean 1/2 doesn't have a finite expansion, but why would it? Most numbers don't.
That would mean 1/2 doesn't have a finite expansion, but why would it? Most numbers don't.