Rake (like make) allows you to add dependencies to a task after you've initially declared it. Indeed it allows you to continue to talk about a task in multiple places. This way I can decide to add dependencies close to the pre-requisite task.
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