Yeah, OP said "successful thing" but I would make distinction of actual product vs an accessory to existing product. AirPods are essentially forced on you if you have iPhone, now that phone jack is gone. If you use other Bluetooth devices you just not perceived as "cool".
Speaking of "cool" I think Vision Pro failed, because it makes one look like a tool. Not only looks bad, but they also spent 3.5 thousands on it.
I would argue that Apple Watch is also just an accessory to the iPhone.