Reminds me of how mobile phones used to have very varied, even whimsical designs and slowly we settled on the rectangular slab. There's probably a point where form and function converge and then everything hovers in that region.
Keep in mind that the phone's primary interface wasn't always a keypad, it used to be a dial or a lever. The speaker and microphone were distinct parts rather than a single "receiver". And they all slowly converged to a couple of very similar optimized designs.
It's the manufactured equivalent of carcinization.