Drupal 8 introduced an interesting new approach called "experimental modules".

These experimental modules are included in the Drupal core, and have inspired several questions from OSTraining members. What are these experimental modules, and is it safe to use then?

Yes, experimental modules are shipped with the Drupal 8 core, but they are not yet fully supported. Here's the official explanation:

Experimental modules allow core contributors to iterate quickly on functionality that may be supported in an upcoming minor release and receive feedback, without needing to conform to the rigorous requirements for production versions of Drupal core. Like other features, new experimental modules can only be added in minor releases, but unlike other features, they may change between patch releases while they are still experimental.