The course libraries have been rewritten since version 4.0. However, for backward compatibility, all third-party plugins use the 3.9-course editor unless they override supports_components in their base class.

In 5.0, the old editor is considered deprecated, and they will be removed in 6.0. This issue includes:

• Add deprecate messages to all plugin formats returning false to support_components.
• Create an issue to remove the supports_components method and all uses in 6.0.