The latest beta release, Rails 6.0.0.beta3 was released last month. In early January, the first release of Rails 6 was announced. Two new major frameworks are added in Rails 6.0 called Action Mailbox and Action Text. There are also two scalable upgrades in the form of multiple database support and parallel testing. Action Mailbox guides incoming emails to controller-like mailboxes in order for processing to take place in Rails. Action Text brings rich text and enables editing such files in Rails.
Though the team at Rails couldn’t meet their aspirational release schedule, they did manage to include around 1000 commits in Rails 6.0.0 rc1. The crew at The Pragmatic Programmers, particularly Sam Ruby, David Bryant Copeland have also come up with beta of Agile Web Development with Rails 6 to coincide with the release of rc1.
For more information on the release, check out their official announcement.