Imagine if you could figure out a way of manufacturing a phone with design on demand… imagine a configurator website where you adjusted sliders and tickboxes. Headphone jack here, screen size slider all the way to the left, battery size all the way to the right, pick your color, oops you can’t have IP68 because you selected the pop-out camera…
Like variable fonts, but for hardware.
Frankly I’ve no idea how you would do it.
But that’s the level of innovation required to unlock this market.
You could make customisable phones but they wouldn’t be anywhere near as good as mass market phones.