Perhaps although this sort of reinforces the point that the design of git tends to encourage creating a lot of individual, single-purpose repositories, leaving

Perhaps although this sort of reinforces the point that the design of git tends to encourage creating a lot of individual, single-purpose repositories, leaving it up to the user to string them all together with gitlab or github or a custom server, if that's what you want. I'm not saying I prefer the subversion architecture, but with subversion the pattern described is quite natural and requires no additional technology or design beyond a directory structure.