[wrtra]

> The article calls out examples like Emacs, Perl, and Python, but the proportion of people who use software and have used (and liked) these tools is vanishingly small.

All tools have benefitted from standing on the shoulders of these and other giants. Software doesn't exist in a vacuum and it doesn't appear fully formed from nothing. Ideas and inspiration are drawn from a multitude of projects. Take a look at the third party software required to build Firefox sometime.