Eh, Apache is a common culprit, but it is not the only one. WordPress sites with a moderately complicated theme and several plugins can easily crumble under loa

Eh, Apache is a common culprit, but it is not the only one. WordPress sites with a moderately complicated theme and several plugins can easily crumble under load even with an nginx+PHP-FPM setup. Yes, you can throw more hardware power at it, but that's true with Apache as well. If you're expecting a lot of visitors to a WordPress site, you will generally want to make sure you have a good cache.