Where is the revolution in meditation research Matthieu Ricard was talking about 20 years ago?

About 20 years ago, Matthieu Ricard spoke on TED about „The habits of happiness“ Ricard spoke of a scientific study about meditation which might be revolutionary. This study was published in PNAS in 2004: https://www.pnas.org/doi/10.1073/pnas.0407401101 But 20 years later in the year 2024 we find podcats of Matthieu Ricard on his YouTube channel: And Ricard …