Works fine if you have Apple Music, without it Siri just can’t do anything anymore even though it used to work fine with local device music.

If we’re being fair, they made the one of the most impressive devices in that category currently - it’s just that category doesn’t really have the tech behind it to deliver what most people want as usable. I do agree though if they had marketed as a VR headset it would have been personally more interesting, but the true vision of the AVP category has yet to be fully realized by any company.

You’ve always been able to change it for built in applications (messages, mail, phone, etc.). I assume the above poster was joking? Or maybe there’s some nuanced feature they added around it recently.

TLDR: Trojan can only be installed with an MDM setup, you should never enroll in random MDM profiles anyways. They started by using it in a TestFlight app, but Apple has since kicked them off.