A fear of being lost in the Google SERPs, that is.
This is another way to apply the quote about fear, posted in the Sayings category before THE announcement. Just installed a nice little plugin that creates a Google compliant XML sitemap and lets Google know about the update(with a ping) every time we post something new. See the autogenerated sitemap of A Group of Web AddiCT(s); blog here or a sitemap of site2 here. It won’t make any sense to most of you but the Googlebot gobbles it up and even comes back for seconds.
Another reason for loving the Open Source Community, apart from all the feebies(Thank you freedom league) , is the quality open source code.