Understanding what is(not) available in configuration features

[mp3monster]

Some features within the traditional configuration are not possible with the YAML options. It might be worth providing a document which shows which features are (not)available in one format both the other with a link to the associated documentation.

e.g. traditional format allows @inclcude and @set but there isn't a YAML equivalent.

This would help people assess what might be involved in switching or deciding which format to adopt

thoughts?