So I got hired at a company, for SEO it's a web design company. We slowly are dropping ranks, haven't really done much link buildng to our own site yet, did a bm and amr blast about it. But our site has 5k+ backlinks including from tons of pr sites and our own sites. Way more than our competitors, we have similar age etc. Only thing is, our website has no been updated in approximately 3 years my boss said. We are rolling a new site out in one week. Is lack of content updates or changes a reason for dropping serps?