It's not a coincidence and I have never heard a claim it was. Apple set it at 30% and Google decided not to compete on price. Of course it is legal to set the price of your product based on a competitor.
When competitors non-coincidentally decide to set their prices the same arbitrary number, that's called "price fixing" and it is potentially an antitrust issue.
Exactly, crazy people are arguing otherwise.
I don't think that is a good situation. It's basically an open duopoly.
I actually don't disagree with this, I just said it is not some "coincidence". Apple was first, Google decided to follow. Good for consumers? Probably not.