One of the roles of a board of directors is to continually assess the company and make decisions in the best interest of sustaining value for the long-term.
Decisions to change business models should be weighed against the core purpose of the organization.
Significant strategic changes necessitate the board to broadly evaluate the impacts on significant internal and external stakeholders.
References:
SEC Chief Accountant Statement: Audit Independence and Ethical Responsibilities: Critical Points to Consider when Contemplating and Audit Firm Restructuring