Yeah, I'm honestly not sure why this new type of AT&T Fiber installation might allow for future self-installs where their original type of installation didn't. I'm just repeating what I've read from folks who seem to know a lot more about the technical specifics than I do (e.g. actual fiber installers).I don't understand why that is something that only works if you run fiber inside the house. If they put a fiber to ethernet bridge on the side of your house, they leave it there and the next person will just plug in the ethernet in the house. They don't even need some special AT&T gateway, that's what's on the side of the house. Inside the house it is just ethernet, they can plug in their own switch, wireless router or whatever and they're good to go and you aren't stuck using some telco abomination that restricts your ability to configure things the way you like.
If the topic interests you, you can dig around in the DSL Reports forums and learn more.