15 years ago adding an external module was an endeavor involving approval forms, lawyers, etc. so that it frequently were much easier just to develop required functionality yourself. These days i still shudder seeing how the build goes somewhere, downloads something (usually you notice it only when whatever package manager being used for that part of the build didn't find the proxy or requires very peculiar way of specifying it - of course at the companies with transparent proxies people didn't notice even that ) ... completely opaque in the sense that even if i spend some time today looking into what is downloaded and where from, tomorrow another guy would just add another thing ...