What you are noticing is that competition is literally the worst strategy that corporations can adopt with respect to each other. Apple and Samsung probably have the keys to each other's destruction, but destroying the other would be bad because the remaining party would become a "monopoly" which is a loss condition, So the destruction is mutually assured, and intrinsic cooperation is possible. There's more money to be made cooperating, so the result is we lose the headphone jack.
I figured the same, but I'm still a little surprised because there are so many major Android phonemakers who should be competing. It's Samsung, LG, Google (Pixel), etc. Though the software is a duopoly of course.
