I thought that line was a mistake too. Your software is just a tiny amount of code (relative to the whole system) making up the control plane between all the p

I thought that line was a mistake too. Your software is just a tiny amount of code (relative to the whole system) making up the control plane between all the pieces. I think the author probably meant that to personally write less code you need to leverage more external code (libraries and network API's). Write less code -> Leverage other peoples code -> More integration with different systems