I wasn't sure what "driven" meant despite hearing it all the time, so I looked in the dictionary:
"Someone who is driven is so determined to achieve something or be successful that all of their behavior is directed toward this aim"
That fits with this early part of the article:
"The concept behind curl development has always been to gradually and iteratively improve all aspects of it. Keep behavior, but enhance the code, add test cases, improve the documentation. Over and over, year after year. It never stops. As the timeline below helps showing.
Similarly, there was no sudden specific moment when suddenly curl became popular and the number of users skyrocketed. Instead, the number of users and the popularity of the tool and library has gradually and continuously grown. In 1998 there were few users. By 2010 there were hundreds of millions."
"Someone who is driven is so determined to achieve something or be successful that all of their behavior is directed toward this aim"
That fits with this early part of the article:
"The concept behind curl development has always been to gradually and iteratively improve all aspects of it. Keep behavior, but enhance the code, add test cases, improve the documentation. Over and over, year after year. It never stops. As the timeline below helps showing.
Similarly, there was no sudden specific moment when suddenly curl became popular and the number of users skyrocketed. Instead, the number of users and the popularity of the tool and library has gradually and continuously grown. In 1998 there were few users. By 2010 there were hundreds of millions."
That very much typifies "driven".
However, there is this at the end of his about page at https://daniel.haxx.se/about.html
LOL!!!