The license purchase page has the following at the bottom of the page. How does this constitute 1 yr of support after the GA release of Ext JS 5? I know it's only 6 weeks early, but still ... there is the principle involved.
Ext JS 3 Support Expiration
Using Ext JS 3?
Support and maintenance for Ext JS 3 ends on 15 April, 2015.Ext JS 5 was released on 2 June 2014, and is available now for new application development and upgrades. Under the terms of Sencha's standard Support and Maintenance Agreement, Sencha will provide support and maintenance for Ext JS 3 through 15 April 2015, after which support for Ext JS 3 will be discontinued. For reference, the complete text of this agreement can be found here.