All methods generated by string_attr_reader are now added to that new module instead of the class. The result is that when overriding those methods you can now call super because they’re are inherited from the new module.

Rails Long Term Support

Rails LTS provides security patches for old versions of Ruby on Rails (2.3, 3.2, 4.2 and 5.2)

Prevents you from data breaches and liability risks
Upgrade at your own pace
Works with modern Rubies

Ruby Metaprogramming: Dynamically Inherited Methods™ | upstream agile - software

Rails Long Term Support