The stories of websites that fell over and died when they got unexpected traffic are legion. A recent example of what not to do would be Target's introduction of a low-priced Missoni collection. The site attracted so much traffic that Target.com was swamped for several hours on Sept. 13, 2011, leading would-be shoppers to face a cute but frustrating site-down page...
"Build once, run everywhere" has been the goal of many platforms, although most recently, the motto was used for Java. It has rarely been completely true. In Java's case, "build once, test everywhere" was closer to the mark ...