You can absolutely publish 3.x.x after 4.x.x, they just won’t be “latest” (of course). Speaking bluntly, this isn’t how libraries in the npm upgrade, and pitch

You can absolutely publish 3.x.x after 4.x.x, they just won’t be “latest” (of course). Speaking bluntly, this isn’t how libraries in the npm upgrade, and pitching this does not inspire confidence.