2002 was before the tipping point, IMO. Open-source software existed, but wasn't always taken seriously. Linux was still widely perceived as being a hobbyist OS unsuitable for "real" applications. A lot of the Internet still ran on Windows and commercial UNIX servers.
> wasn't always taken seriously.
Does Perl and Apache (as in httpd, not the foundation) counts?
They are shipped in many enterprisy software at those time.
., and BIND. NTP, Sendmail. They are all opensource and predates that.
By 2002 I was at Arbor Networks, shipping security software to tier-1 ISPs, and if we'd shipped it on a commercial Unix (let alone Windows) people would have looked at us like we had 2 heads. The writing was on the wall by end of the first dot com boom.