What's missing from this history is the origins of Apache httpd 2.4: as I see it, circa 2009 Nginx started growing. Apache's market share was like fresh snow under foehn (from 75% at this time down to 20% today). Nginx was much more performant and its configuration was saner. Apache had to change or it would gradually disappear.
Another note on this 10 years anniversary is that, though Apache 2.4 was released in 2012-01, it was a rushed release and some features were still lacking. In my opinion, the most important was that mod_proxy could not talk to unix sockets. It made Apache 2.4 hard to use in many cases. This feature only appeared with 2.4.7 in 2013-09.
Nowadays I rarely see Apache installed on web servers that I work with. In one case, it was because the sysadmin was used to it (though 2.4 broke the compatibility with 2.2's config syntax), he didn't consider changing and even kept the awful Apache prefork engine. In other cases, it was because of some modules (e.g. shibboleth) that were packaged by the OS for Apache, but not for Nginx.
Another note on this 10 years anniversary is that, though Apache 2.4 was released in 2012-01, it was a rushed release and some features were still lacking. In my opinion, the most important was that mod_proxy could not talk to unix sockets. It made Apache 2.4 hard to use in many cases. This feature only appeared with 2.4.7 in 2013-09.
Nowadays I rarely see Apache installed on web servers that I work with. In one case, it was because the sysadmin was used to it (though 2.4 broke the compatibility with 2.2's config syntax), he didn't consider changing and even kept the awful Apache prefork engine. In other cases, it was because of some modules (e.g. shibboleth) that were packaged by the OS for Apache, but not for Nginx.