A different take on what we're doing with ActiveType Show archive.org snapshot . Since it lives under the rails organization it might be part of Rails 5?

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

rails/activeform

Rails Long Term Support