Of all the content in this article, "modern browser" is what you latch on to? This author isn't shaming you for your choice of browser, or telling you what you should be using for day-to-day browser.

"Modern browser" means a browser that keeps up with modern web standards. Yes, w3m (for instance) still receives updates, but (going by the changelog) those updates refine how the browser handles very old web standards rather than extends support to new ones.