I have watched it happen my whole career. The research is good, the recommendations are sound, then the thinking leaves with the person who did it, and the organisation is holding a document nobody knows how to act on.
That is why I spent a decade as an internal design leader. Inside, I was the one who had to turn insight into action, then defend it, resource it and ship it. I came up through project management as well as design, so I do not hand over work that cannot move into delivery.
I built AGL's design function from scratch and grew it into an enterprise capability. At RACV the function already existed, so I doubled the team, embedded design QA to lift the quality of what they were shipping, and scaled the practice so projects touching the customer experience took a design-led approach.
I do that work from outside now, for two kinds of people: executives who have invested in design and want greater impact from it, on customer experience and on business outcomes; and design leaders who know what design is worth and need help making the case upward so they can scale.
The design QA I embedded at RACV is still in place. The CX architecture I delivered at AGL still aligns the organisation around its customer experience. Both have restructured since I left. I have been gone for years. The work stayed.
Both have since brought me back as a consultant, not to rebuild what I left, but for new work.