Not OP, but here are some (IMO big) advantages Apache has over nginx (FOSS):

- Provides HTTP caching (via mod_cache)

- Simplifies the deployment stack by providing built-in interpreters for dynamic languages. e.g. mod_php (i.e. you don't need php-fpm), mod_wsgi (i.e. you don't need gunicorn)

- Load-balancer upstream affinity ("stickiness") based on HTTP cookies

- Load-balancing based on upstream's connection count (via mod_heartbeat)

- Built-in Let's Encrypt integration (via mod_md)

tl;dr provides a lot of features out of the box -- some people may see this as "bloat" or overly tight coupling, but this provides simplicity.