Three months ago a commenter here on HN claimed to me that this will be bad for Apple users:

> There is simply no good way to make the API public while maintaining the performance and quality expectations that Apple consumers have. If the third party device doesn’t work people will blame Apple even though it’s not their fault.

And, competition probably can’t build for it anyway:

> It’s impossible to build Apple Silicon level of quality in power to watt performance or realtime audio apps over public APIs.

And:

> […] Apple has to sabotage their own devices performance and security to let other people use it. The EU has no business in this.

Well, I look forward to next year when we’ll have the receipts and see!