Fair enough. It probably would make sense to have a Conda like release of Julia that comes out every year with a broad but curated selection of packages.
I don't think you'd actually want to include each of those packages in a standard distro: does the average user really need to programmatically send emails or deal with Voronoi tessellations? Probably not, but I still think there's value in a batteries-included approach, especially when working with students.