We believe that Prism is now at a stable state, I've been testing it for the last few hours and can't find any bugs that haven't been patched between alpha 3 and alpha 4. Prism is still lacking features - but we're stable (despite the fairly new Heliactyl Next base) now. Now it's time to add all of the features with the stable 0.5.x and 0.6.x releases. Thank you for using Prism!
Full Changelog: 0.5.0-alpha4...0.5.0