If a Website Is 5 Years Old or More, a Redesign Often Makes Sense
As a general rule, if a website is 5 years old or older, it is often time to seriously consider a redesign. That does not mean the site is broken. It means the web has moved forward.
In the last several years, there have been major improvements in the tools, libraries, frameworks, performance methods, mobile design standards, accessibility expectations, browser behavior, and conversion-focused design practices used to build modern websites.
A website that was considered solid 5 or 6 years ago may still technically work, but it may no longer perform as well as it should.