Depends on the application. In e-commerce and I believe many other industries as well will depend on fast responses for conversions. For example, a page that lo

Depends on the application. In e-commerce and I believe many other industries as well will depend on fast responses for conversions. For example, a page that loads ~2 seconds will start to lose bounce rates/ conversions. Of course full page cache is the first stopgap for this problem but you'll always have dynamic content.