Then to accommodate all users, the perfect lineup sounds like: * iPhone - iOS (touch only) * iPad - iOS (touch only) * iPad Pro - iOS "Plus" (iPad + attachab

Then to accommodate all users, the perfect lineup sounds like: * iPhone - iOS (touch only) * iPad - iOS (touch only) * iPad Pro - iOS "Plus" (iPad + attachable keyboard/trackpad) * MacBook - iOS "Plus" (iPad + built-in keyboard/trackpad) * MacBook Pro - macOS * iMac - macOS * Mac Pro - macOS