Most of the people that would read non-technical blogs have changed their browsing habits to mostly consume content on Facebook. Most commercial content has moved to social media. Forums have disappeared for the most part. My hobby, and I suspect a lot of hobbies, have moved on to social media. As an example, the local tabletop gaming community here at one point had four distinct forums and a large number of hobby blogs. All of that is now on Facebook.
I think you can see the impact of that on the decline in Blogger support and Wordpress' move to include more tools and support for 'professional' bloggers. Wordpress is more and more a platform for those SEO huxsters.
Blogs aren't going to come back to the internet until the audience for them comes back and that won't happen until social media, especially Facebook, is no longer capturing that audience.