The text reflects on the numerous impacts related to considering accessibility as a strategic principle to redefine the public role of museums. Accessibility policies build proximity, capable of creating trusting relationships and fostering new forms of participation. In this sense, the opening to the sensory-perceptual dimension in the visit paths enriches the museum narrative, welcoming new audiences; as well as the use of technologies as enablers of meaning. All these accessible interventions produce measurable returns, also in terms of economic sustainability: a mature managerial reading of the phenomenon shows how these interventions generate value in the medium-long term. Accessibility also produces effects on the level of social sustainability, expanding cultural citizenship, reducing inequalities, and generating relational well-being. Accessibility is therefore a fundamental lever for the future of museums and, above all, an investment that produces the future.