Some sites are simply static exhibits.
But they won't hold a Web surfer's gnat-like attention span. You can make this sidebar easily using tables and templates. Common features not only cache, making subsequently selected pages load faster, but also take 90 percent of the donkey work out of a designer's job. So don't let your sites grow stale and risk your readership deserting you. Even if it's just a spelling correction it'll make those insidious push engines register a change.