Nothing is what you get, when you have a creative thoughtful design and then refine it step by step whilst paying attention to detail.
Nothing OS is a great example. Nothing OS 1 looked like stock android but it was well optimized and had places, where the design language shone through.
With OS 2, everything is consistent and has now a uniform look. With every update, new features were added and old features enhanced.
Doing the important thing first and then refining the experience step by step towards a greater vision is what made nothing so successful.
I, for example, was fed up with my Samsung, that felt very uninspired. Nothing on the other hand made phones interested. Every update brings something new and interesting.
Nothing is is existing.