Over 99,99% of sites hacks are focused attacks on specific plugins and themes vulnerabilities. A huge improvement over Site Security since hackers web scanners will not find any WordPress traces on your site. Since no WordPress plugins and themes are found anymore, no hack occur even if the site contains exploitable code.
Provides a clean method for removing any WordPress fingerprints including themes and plugins.
No negative impact on SEO at all! Used wisely, specific SEO aspects can be improved.