Having the date in the URL (Permalink) of a blog post is becoming more important as the Web ages and fills up with ever greater amounts of content. There are many old articles out there and anarticle from 10 years ago might not be accurate today. I have started appending “2018” on many searches in Duckduckgo (ie: “best podcast software for linux 2018”) so I get more recent articles. But it also helps when you can see the date in the URL.