Even the team working behind this might not have a clue on release date. Better take much time and get a proper output. As you can see many product with a proper base taking around 4-5 years for the final release even it does have bugs. So take much time and release a proper one other than one with lot of bugs. Current forum which a well established software serves a better platform for now. Everyone is too eager to see the new product. But must understand that SMF is a long run project with lot of contributors so not expect much on new forum tool.