I agree but that is okay. If you have a site where security is irrelevant (or you think you do) then stay on WP 4 and don't upgrade. Let the those who need ne

I agree but that is okay. If you have a site where security is irrelevant (or you think you do) then stay on WP 4 and don't upgrade. Let the those who need new features and modern security update. I think it's worse to think you're up to date because your Wordpress install is up to date, but you are hashing with md5 and using php 5.2.