I feel like the iPhone mini being only two years long is a strong counterpoint to this. There's a small hope for an iPhone 15 mini, but with no 14 mini, it's a long shot. It accounted for 6% of all iPhone sales in it's first quarter, after a delayed and rocky launch.[1] There is a small but somewhat vocal minority that want smaller screens, which Linus Tech Tips' sub-channel Mac Address covered recently. [2]
[1] https://www.tomsguide.com/news/iphone-12-mini-sales-a-disast... [2] https://youtu.be/BjhiYa0KsSM