I believe that old is gold. Old blogs matter a lot. There are countless reasons why you should care about your old blog posts, but one of the biggest reasons is that Google likes fresh content. Google displays dates right on their SERPs to show users when a piece of content was last updated. Therefore, if you update older posts, Google will show the date you last changed a blog post on the results pages rather than the original post-date. This means that you can benefit from higher click-through rates, traffic, and more. This increase in traffic led to tons of backlinks. More backlinks led to higher search rankings. And higher search rankings led to even more traffic and backlinks.
You can read more here: https://neilpatel.com/blog/update-old-blog-posts/
Besides if you do have any questions give me a call: https://clarity.fm/joy-brotonath