Lots of reasons. First of all, it is fast and reliable. The choice of MPMs allow for sys-admins to choose exactly how they want httpd to scale. Unparalleled RFC

Lots of reasons. First of all, it is fast and reliable. The choice of MPMs allow for sys-admins to choose exactly how they want httpd to scale. Unparalleled RFC compliance. Load balancing with dynamic, runtime configuration. Failover. .htaccess file. Full support for FPM/FastCGI. Fully Open Source and community driven (not Open Core). mod_rewrite capability. Hundreds of modules for almost every and all situation. Most people simply take the "lazy" route and not even investigate httpd, instead relying on the FUD about much older versions (you still get, for example, the screed that "Apache forks off a new process for each request")... Apache httpd 2.4 is just as fast and reliable as any other web-server out there, nginx included. It's just not seen as the "cool and hip" web-server. I guess some people are more concerned about marketing.