Field Collection Module

The Field Collection Module is/was a predecessor to the Paragraphs Module. Given the development of the Paragraphs Module and the overlapping functionality of the two, the paragraphs module is surely the preferred implementation of this functionality. Both modules implement fieldable, themeable, groups of fields. This is very useful functionality, important functionality, but the paragraphs module is surely the way to implement it. However, the Field Collection module enjoys a significant deployment quotient, probably by Drupal 7 websites.