Milestones menu has recently been added to BootCamp. Now you have a way to check your current progress and plan your next move in the idle part of the game.
How can milestones help you reach faster progress?
Besides it definitely being a nicer view for your current progress, you can also use it to help you plan your next move to optimize your progress better. There is a list of all current units that shows you all reached and upcoming milestones. Players also have the chance to check their total progress of all reached milestones.
Why do players bother to reach next milestone?