> when you sell a billion devices and the little jack costs a buck a device you just made yourself a billion dollars for nothing
You're looking at it the wrong way. It's not the money you save; it's the money you make by selling adapters.
Also, there might be legitimate engineering reasons for getting rid of the 3.5mm jack. It is rather large by modern standards, maybe there are also water-proofing concerns. It's a trade-off I wouldn't make, but I'm neither Apple nor Google.
You're looking at it the wrong way. It's not the money you save; it's the money you make by selling adapters.
Also, there might be legitimate engineering reasons for getting rid of the 3.5mm jack. It is rather large by modern standards, maybe there are also water-proofing concerns. It's a trade-off I wouldn't make, but I'm neither Apple nor Google.