What this will amount to is irrelevant: it's still vendor lock-in even if it doesn't lead to any antitrust violation. It's simply what it is, by definition.
Exactly, and one of the most widespread ways companies try to foster customer retention is by implementing some form of lock-in.
There is a key difference. When you only sell your own products and services and use those as a lock in method, it is very transparent. Not that this cannot still lead to a monopoly (Internet Explorer is a great history lesson) if you use your power to abuse things and break the law.
But in Apple's case, they take on a role of a products/services provider, marketplace, and distributor with a large market share of the space in which they operate.
When you hamstring competition willfully, deliberately, and knowingly in an arena where there are contracts and rules you created (and legally, if you create rules even if they aren't law, you can and will be held to those rules in court), you're asking for an antitrust suit and probably deserve one.
Adding fuel on the fire, most of Apple's services and apps they've been anticompetitive with are complete copies or rip offs of things that were in their marketplace, with Apple having access to every line of code. When you reject apps for reasons that your own offerings have the same issues but exist, that is another problem.
The real pain point for Apple is that a developer is required to use the App store, it's payment systems, and abide by the rules which are not equitable across developers. A juggernaut like Amazon gets a 15% rate, but a start up would have to pay 30% for a music or video streaming service, giving Apple a competitive edge as they don't pay any cut to themselves and have more margin while putting their services front and center and burying competing services that they .... yes, copied and ripped off.
These aren't the first round of damning emails nor will I expect them to be the last.
Google is under the same scrutiny but Google has a bit of an advantage. 1. They allow side loading (and let their users adult with their choices). 2. Anyone can skin and fork their own flavor or Android and can also create their own App stores for Android of they so choose to.
What Apple is doing is not the same thing as what Comcast does to lock in subscribers by offering almost free wireless phone service for using their internet or charging an exorbitant ala carte cost for internet to deter cord cutting.
Don't listen to me.... they quite blatantly discuss the anticompetitive strategies they use in emails.
If you ever had to take business law classes in college, literally all of these behaviors are in the list of things that are used to identify monopolies.