Don't forget about the 'low cost web design' market. If you're buying a web design for south of $500, you're PROBABLY getting a WordPress next next finish install with a default template and some minor tweaking.
I've screened / interviewed so many jr web "developers" who don't actually know how to develop a web app and they claim that installing WordPress plugins is development experience.
Many mom and pop type businesses find the lowest cost web designer they can find to build them a WordPress site then get upset with the hosting company when "the server gets hacked" and their site is redirecting to a malicious site.
WordPress is certainly a powerful platform but the fact that it is so easy for someone to get started is also a weakness because those people don't understand it isn't just set it and forget it.