I think what the grandparent meant was one human language (e.g. English) and one machine language (e.g. Python).

Honest question: is it really so hard to manufacture these inserts in the US?

No, not really. But the margins aren't great, and you've got to allocate the manufacturing capacity to make the paper, which takes time.

It's not hard but it's much cheaper to do it abroad, even after factoring in shipping.

Last or year-before-last's container shortage + Evergrande shook that one up though.

Once you did the initial capital investment, no.

In my part of Europe, you pay on sale, not vest or grant.