My experience is that you don't want human readable and user visible to be sortable, but to have as unique prefix (and when you have experienced workers also po

My experience is that you don't want human readable and user visible to be sortable, but to have as unique prefix (and when you have experienced workers also postfix) as possible. So this is certainly useful, but specifying human readable representation is somewhat redundant. Another issue is that there are cases when you want to represent the ID as barcode of reasonable size and readability, which invariably leads to decimal-only Code128 with at most ~30 digits.