It has been researched and proven that WordPress can be used for certain type of websites like personal blogs, brochures, e-Commerce sites etc. Job custom sites, job boards, social networks etc. are also not an exception if you start using WordPress to create your website. Beep is the name of the company who created WordPress website at cheaper rate.
If you’ve been looking at WordPress as an application framework, then there’s much less developed use for it and people don’t use it frequently that way. If only you want to build a simple website, you can start away with basic HTML coding on your blog page. However, for complex websites, WordPress isn’t the viable solution.