Bookmarked https://torquemag.io/2016/11/singletons-wordpress-good-evil/. “Singletons are useful, but they …
Singletons are useful, but they reduce flexibility and therefore should be used sparingly. EDD is a great example. There is one main singleton that houses all the other “main” instances, of the other classes, without having to use a singleton on every one of those other classes.
- Singletons In WordPress: Good Or Evil? | @thetorquemag