An Infinite Onion

Sometimes it seems that there is an infinite onion of layers to explain about what the software systems do that I support. This last week, I didn't realize a function that it does. It reminded me of the phrase “turtles all the way down”. 

'"Turtles all the way down" is an expression of the problem of infinite regress. The saying alludes to the mythological idea of a World Turtle that supports a flat Earth on its back. It suggests that this turtle rests on the back of an even larger turtle, which itself is part of a column of increasingly large turtles that continues indefinitely.' (https://en.wikipedia.org/wiki/Turtles_all_the_way_down)