. Break apart the programming/setup from the physical interface.
. Use a phone or pc for all setup, perhaps like a Google wifi router, a lot of the time this is done by a different person than the end user.
. make it look like a Tivoli Model One, except with an 8 (or so) pole switch or button set. off/am/fm/aux/internet preset 1-5
These came quite close to this (but have since been discontinued by Urbanears). Physical knob presets to internet radio stations (or turn it to “airplay/Bluetooth mode”)
The other thing I worry about with internet radios is to keep the price low. It's just too easy to have the underlying webstrate (is that a word?) up and disappear. Think of Frontier or the death of the early Grace Digital radios (Reciva?)
Years ago, most new companies made a physical thing, and if I helped they had supporting software. The move into an economy based on surveillance advertising appears near-total.
Obviously you could sell a box with knobs and buttons and a speaker that a R-Pi is stuck into, but that's hardly mass market and itself wouldn't be cheap to build at low volume.