Comment by saurik

In any language, arrays are inherently regions of memory and indexes are -- whether they start at 0 or 1 -- offsets into that region. When you implement more complicated algorithms in any language, whether or not it has pointers or how arrays are syntactically manipulated, you start having to do mathematical operations on both indexes and on ranges of index, and it feels really important to make these situations easier.

If you then even consider the simple case of nested arrays, I think it becomes really difficult to defend 1-based indexing as being cognitively easier to manipulate, as the unit of "index" doesn't naturally map to a counting number like that... if you use 0-based indexes, all of the math is simple, whereas with 1-based you have to rebalance your 1s depending on "how many" indexes your compound unit now represents.