The problem with most businesses that have long been established like decades ago do not adapt to changes. They think that the usual business model they used that led them to earn thousands of dollars when they first started will still bring them the cash when in fact it does not.
Most of these businesses have been defeated by new comers who bring in innovation to an old idea, product, or service. Have you ever wondered how Microsoft stay on business even after decades? They innovate, and bring in new products to the public. Perhaps, let your client innovate their current product or bring in something new to the market.