Even though the gradual engagement meme has been around for a while, and everyone just hates signup forms, they just seem to keep popping up like a bad habit.

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

Beta Blog: Kill Your Signup Form with Rails

Rails Long Term Support