Rethinking UX for Sustainable Science Gateways: Orientations from Practice

As science gateways mature, sustainability has become a central concern for funders, developers, and institutions. Although user experience (UX) is increasingly acknowledged as vital, it is often approached narrowly--limited to interface usability or deferred until late in development. This paper argues that UX should be understood not as a discrete feature or evaluation stage but as a design-oriented perspective for reasoning about sustainability. Drawing on principles from user-centered design and systems thinking, this view recognizes that infrastructure, staffing, community engagement, and development timelines all shape how gateways are experienced and maintained over time. Based on an interview study and consulting experience with more than 65 gateway projects, the paper identifies three recurring orientations toward UX--ad hoc, project-based, and strategic--that characterize how teams engage with users and integrate design thinking into their workflows. These orientations are not a maturity model but a reflective lens for understanding how UX is positioned within gateway practice. Reframing UX as a structural dimension of sustainability highlights its role in building adaptable, community-aligned, and enduring scientific infrastructure.