Dany Goldraij
What competitive advantage are you giving over your competitors?
Competitive advantage is what makes a customer choose your business over another one.
What will give you a competitive advantage? Competitive advantages are attributed to a variety of factors including branding, the quality of product offerings, intellectual property, and customer service.
What are competitive advantages examples? I can give you some reasons (how to update website content) to do this:

Do you need to update your old posts?
1. First reason: It is fastest to correct a post than to write a new one (blog boost traffic).
2. Second reason: To provide a "good" quality of content, means to provide updated information to your readers/customers.
3. Third reason: Improves the Freshness of Your Content
3.1 Add new photos or /and links to the article, which will give the article a new "look" or a fresh view.
3.2 New content for web page,
4. Keeps Your SEO Up to Date (better SEO / blog for SEO purposes). By freshening up your content, you can boost your search engine optimization (SEO), increase your click-through rate, and possibly even see an increase in subscribers and customers.
5. Get more backlinks. No external site wants to link to outdated content
6. It is a great competitive advantage for the business.

Let see what are the professionals and Guru's saying about this issue:
Neil Patel said "is important because, in Google's algorithm, you're more likely to rank higher if more people click on your content from the search engine results page. So updating your content will make it more appealing, and that appeal will tell Google it's a better resource than should rank higher".
Problogger said "If you’ve been blogging for a year or more, you might feel like you’re running out of ideas. There are plenty of great posts in your archive, but you’ve covered so many good topics already. How to Republish Old Blog Posts – and Why You’ll Want to".
Adagemagazine and website published the following " WHY YOU NEED TO UPDATE YOUR OLD BLOG POSTS (AND 4 TIPS TO GET YOU STARTED), " According to an Adobe study, 38% of users stop engaging with unattractive content. Imagine a reader landed on an old blog post of yours, and instead of being unimpressed and abandoning your website, they’d be met with updated content that accurately represents your expertise.
Updating your old blog posts will breathe new life back into them. Not only will you be able to turn those posts into something you can be proud of today, but updating your old posts has a number of other benefits as well.
Databox published "Tips for Updating Old Blog Posts for SEO & Boosting Organic Traffic"
Consolidate mid-performing content.
Add the current year to your heading tag.
Update meta tags for keywords with a low CTR.
Answer “people also ask” questions.
Improve your search intent match.
Add internal links to recent content.
Link to new research studies.
Republishing Old Blog Posts: How to Do It and Why It's Important
Run a Content Audit to Find the Posts That Fit Into One of the Buckets Above. ...
Edit the Article Copy. ...
Update the Title, But DON'T Change the URL. ...
Choose a More Relevant Call to Action. ...
Save Your Changes, Then Unpublish the Article. ...
Republish!

It is clear to you WHY, so run to your blog and UPDATE YOUR POST!!!!
Creating a new post is not simple.
How To Update Your Old Blog Posts For Maximum Traffic