Line Mesh between Objects

I do a lot of meshy connections - e.g. 4 objects on top row, 4 objects on bottom row.
This ends up with me manually creating 16 lines to interconnect all top row objects to all bottom row objects.

As I move into 8 and more objects on each row, this is very laborious and error prone.

Does anyone have any tricks for creating meshes of connections between rows of objects?