Let's say you built a custom CMS for yourself and had 200 sites running on different servers, using that CMS. And they had good ranks everywhere. But Suddenly after a couple years You start noticing some of that CMS' sites are being dropped by google. Although i am poised not to agree to the assumption that its just because of something wrong in that CMS, but is it possible ? Or they are being dropped just due to the other "not-so-cool-now" seo techniqes ?
Or something in-between ? a mixture of Both ?
[edited by: Anyango at 4:53 am (utc) on Nov. 25, 2008]