A means of quickly giving a UIViewController class-level functionality for being instantiated as the initial VC of a Storyboard of the same name.

StoryboardInitalVC.swift

extension UIStoryboard {
    static func instantiateInitialVC<T: UIViewController>() -> T {
        let className = String(describing: T.self)
        return instantiateInitialVC(storyboardName: className)
    }
    
    static func instantiateInitialVC<T: UIViewController>(storyboardName: String) -> T {
        let className = String(describing: T.self)
        let storyboard = UIStoryboard(name: storyboardName, bundle: nil)
        guard let instance = storyboard.instantiateInitialViewController() as? T else {
            fatalError("\(className) was not properly configured with a corresponding storyboard as the initial view controller.")
        }
        return instance
    }
}

extension UIViewController {
    static func instantiateAsStoryboardInitialVC() -> Self {
        return UIStoryboard.instantiateInitialVC()
    }
    
    static func instantiateAsStoryboardInitialVC(storyboardName: String) -> Self {
        return UIStoryboard.instantiateInitialVC(storyboardName: storyboardName)
    }
}