When you say “developers”, you mean developers of another product, who want to add a blog or something? If that’s the case, I can better see the audience.
I think these dudes have it in their head that they just wrote the next React/Vue-tier JS framework, but in the CMS space.
It looks like he's talking about developers, in the sense of individuals or teams that build content sites (read: deploy and configure Wordpress or other CMSes) for customers as a business.