front end, no. It changes too much. Back end, maybe. Only for the core logic that (probably) won't change. Basic rule: don't let work create more work if the b

front end, no. It changes too much. Back end, maybe. Only for the core logic that (probably) won't change. Basic rule: don't let work create more work if the benefit's not worth it. You probably knew that already, so just stick to it.