Saying it's strictly better is exaggerated. The benefits of 0 indexing are well known and mostly revolve around the fact you tend to have far less fiddling with -1 and +1 as you write code.

How do you access the item in a 2D array represented on a flat array? my_array[x+ywidth]

But what is all that starts at 1? my_array[x+(y-1)width]

I did a lot of code in both systems and I remember distinctly that 1.. indexing just was more work to do, in turn bringing in more off by 1 bugs.