I remember reading somewhere that they are doing it, and releasing all the information about how they did it, as well as common pitfalls. The purpose of that was to give other cities the information they needed to successfully implement it.

This is where I lay my vote. The whole hybrid situation where private companies are given (often) exclusive rights to lay infrastructure on private right-of-ways and easements leads to natural monopolies. The infrastructure on public land ought to be public.

Or if the government actually used its regulatory power and mandated that companies need to lease last-mile to anybody who wants it at competitive rates.

Competitive rates means not at a loss to the provider - so the libertarian can please stop screaming. At the same time, last mile should be treated as a commons, simply because having everybody provide that doesn't make a lick of economical sense.

(And if it has to be, split ISPs and last-mile providers. You can't run both. That removes a giant conflict of interest)