Precisely the opposite reason R drove me away. R uses 1 based indexing.Seriously we should all be using Zero based indexing for all purposes.
Or one could appeal to adherence to existing standards. Fortran is the oldest (portable) programming language and was 1-based.
Or one could appeal to consistency with the problem domain. Again, math [EDIT: indices are] 1-based.
Zero-based is consistent with C, but that’s about the best argument I can make for zero-based.