If you don't have indices, you can't have slices, you can't splice, and you wouldn't be able to do a binary search, and you won't be able to use a Schwartzian Transform in the way you are used to do it now. Basically, if you give up indices, you give up random access into arrays, and you're downgrading arrays to linked lists. I'm very glad I don't program in languages that don't give me the full power of arrays.