Heck, this is just replacing a numeric unique-identifier with a textual unique-identifier. Many companies have already gone this route by getting phone numbers

Heck, this is just replacing a numeric unique-identifier with a textual unique-identifier. Many companies have already gone this route by getting phone numbers that spell clever things according to the letters on the phone keypad. Technology has completely obviated the need to remember phone numbers anyway, so overhauling the whole system at this point would be a complete waste.