Earlier quoted context omitted.
This is cap. I worked on heads up glasses, and one of our issues was the lack of integration with Apple's iMessage ecosystem. Device makers are willing to go through several security measures, like deploying the MFi chips and certification. However, at best this gives you access to the notification system, not iMessage itself. You are able to respond to messages via the notification framework, but not integrate direc…
It might be a walled garden (which is a form of security) but thats also why a lot of people buy their products. Know your demographic.
Edit: or maybe I'm wrong. I do know one person who bought a phone because it sucked, because they didn't want to spend as much time glued to the device. It was an Android with a tiny tiny screen, though, because iOS would not be allowed to run on hardware of your choosing due to Apple's restrictions... Either way, I guess there is a market of people who do want to inflict pain upon themselves, but this really does seem like exceedingly niche argument to me. Saying that the restrictions are the reason why their demographic buys their device is just buying into Apple's lies that fund their bottom line