This depends greatly on the potential cost of the product implementation for your business. For businesses who are current users of Dynamics AX, Dynamics NAV, switching to related functionality within Dynamics 365 will require, at a minimum, data migration. However, for other businesses this will require a full implementation of the ERP software so the cost of implementation will be significant in relation to the cost of the licenses, just as it can be with any other ERP solution. On the plus side, the structure of licensing for individual applications will definitely help some businesses reduce their ongoing costs.