I like the idea of paper and agree that it something that is bit further down the track. I also think the website listing reproducible papers my be a good idea but maybe reference to data/fit and link to the paper will be more valuable? It seems to me that PANOSC project (https://www.panosc.eu/) with FAIR data activities can be something to look at. I can explore possibilities as ESS is involved in the project
Perhaps a future goal should be something like this for data reduction/analysis of reflectometry data (the actual data is the scope of the File Formats WG).