WordPress is great for some uses, overkill for others, and poorly suited for still others.
For websites built primarily to display information—which is most websites—we'd argue that WordPress is the right solution most of the time.
WordPress quickly becomes a liability in web and mobile applications built around highly unique and interrelated data types.
If you've got a very simple goal, stick with simpler infrastructure—things like Tumblr or WordPress.com blogs, Squarespace sites, Facebook pages, and Unbounce landing pages.
If you're a web developer or site owner, a good question you should be asking yourself is: "When should I use WordPress?" As (in our minds) the world's greatest CMS, WordPress is fantastic for some things, overkill for others, and poorly suited for still others. If you don't know which is which, you can end up in a bind.
In other words, you've got a decision to make, and decisions mean one thing: Flowcharts.