>>1944455your brain has been fried to a point of no return. sad.
>>1944443my point is that it is in fact, cheaper at every point of the manufacturing chain, it should be cheaper to the end customer as well. It isn't just out of greed from manufacturers and mamils who don't know better.
I've worked in electronics and we did a lot of projects with china, and the common thing you learn is that if you can use a off the shelf unit to do the job, even if it's ass-backwards, it'll be 3, 4 times cheaper because you can order them from anywhere and just put it in a rig and solder, boom, done.
Pick a small battery, a charger, a servo unit and a run of the mill set of jockey wheels, you should be able to make a DI2 equivalent for pennies.
Why doesn't anyone try that? Because manufacturers go to bed with component overlords and simply won't go down quietly, add to that the fact you'd need a good angel investor in order to propel the prototypes to a market that's proudly overxpending on bullshit like ceramic bearings, voi lá.