Generally, only simple tips are useful. A tip should not explain all details like a reference manual. A tip may deal with a complex topic. However, the tip should merely illustrate the concepts and provide an example. It should not cover all possibilities. If a tip is only useful in an obsolete version of Vim, the tip should be deleted. Vim version 7.0 was released in May 2006 and the best tip for people using older versions is please update! See deleting a tip, or the template guidelines to flag a tip as Deprecated or Dodgy.