Auto-create Product vs Auto-update Product

Auto-create Product vs Auto-update Product: Auto-create Product option in settings to allow for new products to be created if they don't exist in the product library, with the current Auto-update Product as an optional sub option.
This will allow for greater flexibility, as it will allow to populate the library overtime/ add new items, without affecting existing products in cases where line items need to be modified for only this specific invoice.