WordPress sites often suffer from technical debt. You don't need a massive...

https://bizzmarkblog.com/should-i-remove-or-redirect-broken-links-in-old-blog-posts/

WordPress sites often suffer from technical debt. You don't need a massive overhaul. Try image compression to boost speeds, fix broken links with Broken Link Checker, and update internal linking to give old posts new life. These shifts move the needle.