Recently Wordpress has announced that in early 2017 the company is planning to change certain features obligating websites to have HTTPS. I found more info here: https://www.bleepingcomputer.com/news/security/upcoming-wordpress-features-will-require-hosts-to-support-https/
This doesn't mean you won't be able to use Wordpress anymore without an HTTPS but it will mean certain features like API authentication will be available only for HTTPS websites.
So there you have it, another blow for people wanting to use plain old HTTP websites. First Google pushed this idea of "forcing" websites to migrate to HTTPS now Wordpress does the same. Even if you are a content creator, in a few years you will be forced to switch to HTTPS is you want to stay relevant both from a new features point of view but also from a ranking point of view.
Getting an HTTPS nowadays is not really difficult, there are plenty of free ways you can earn an HTTPS and also migrate everything from HTTP to HTTPS.