Summary
When we are developing an application in a team environment, it is important to have a well-defined coding style that is adhered to by everyone on the team. This allows us to have a code base that is easy to read and maintain.
If a style guide remains static for too long, it means that it is probably not keeping up with the latest changes within the language. What is considered "too long" is different for each language. For example, with the C language, too long will be defined in years, since the language is very stable; however, with Swift, the language is relatively new, and changes come pretty often, so "too long" can probably be defined as a couple of months.
It is recommended that we keep our style guides in a version control system so that we can refer to older versions if need be. This allows us to pull older versions of the style guide and refer back to them when we are looking at older code.
It is recommended, not only with Swift but...
