The Jenkins 2.0 overview page has screenshots and details: https://jenkins.io/2.0/ https://jenkins.io/2.0/ It also explicitly mentions backwards compatibility:

The Jenkins 2.0 overview page has screenshots and details: https://jenkins.io/2.0/ https://jenkins.io/2.0/ It also explicitly mentions backwards compatibility: > Jenkins 2 is a drop-in replacement of the Jenkins 1.x series of releases and fully backward compatible. There is practically no reason not to upgrade!