[joe_the_user]

If the materials of software are for-loops or text files, I think one can say that "we" are familiar with them.

A simple program or a simple piece of a large is something one can be very familiar with.

Indeed, the particular parts are more predictable than particular parts of buildings, who behavior changes over time, which literally rather than metaphorically wear-out, which have to simultaneously fulfill a number of functions simultaneously, etc.

So I think it is ultimately a matter of the state-space of the ingredients rather than a lack of familiarity with the materials.