Thanks a lot! This is indeed hard and great work. Taylor has provided almost 60 top-quality patches to JOSM core and has become by far the largest contributor of merged patches the last year: https://josm.openstreetmap.de/query?resolution=fixed&reporter=~taylor.smock&col=id&col=summary&col=type&col=status&col=priority&col=milestone&col=component&desc=1&order=id

Thank you for this kind message :)

Amazing work, thank you! To check if shortcuts are missing, you can use the exhaustive list automatically generated on JOSM wiki: https://josm.openstreetmap.de/wiki/DevelopersGuide/ShortcutsList