I wouldn't worry about that - I still think its worth it. I've had systems which during development we thought the Contact page was going to be called 'Contact' in the UI but at the end it got re-labelled to 'Individual' but in all the code it was still called Contact and the IDs all started with a C - but you know what? It was still useful to look at an ID, see the C and know that it was an Individual.