Closing the Gap: A Review of Accessible Design Research and Its Real World Implementation, 2020 to 2026

This paper reviews how much progress accessible design research has made between 2020 and 2026, and how much of that progress has actually reached real digital products. We look at how much research attention different disabilities receive, whether that attention translates into accessible websites and apps, and why the two often do not match. The review draws on seventeen studies covering UX practitioners, large scale website audits, co design projects, and the newest wave of AI powered accessibility tools. We find that research volume has grown substantially since 2020, but that growth remains concentrated on a narrow set of disabilities, mostly blind and low vision users, while cognitive and intersectional needs stay under studied. We also find that measured research attention does not reliably predict real world accessibility, since blind users, the most studied group by far, remain the worst served group on real websites tested in 2025. The same imbalance reappears in the newest research on AI and accessibility, suggesting the gap between research and practice is not shrinking with new technology, it is repeating itself. We close by identifying where the field's own evidence points to solutions that already work at a small scale, and where a promising idea still needs real testing before it can be called a proven one.