The Supreme Court sided with Verizon, who said basically "fiber is too expensive for us to be able to deploy, unless we get a monopoly over the infrastructure we build".
This has lead to enormous stagnation. DSL remained a competitive service, with a variety of competing entities, in the 90's & early aughts, because it still remained under the Telecommunications Act, of unbundled network elements, because of unbundled local loops. As soon as one company was allowed to own the infrastructure & every means to connect over it, the system of competition & innovation that had been working went away.
Now a days we have municipal service providers getting started. They too will exist in these same terms, as local infrastructure monopolies. They won't have a regulatory framework that systems like POTS / copper have, won't have any standards for cooperation / competition, since fiber as a whole has never been unbundled. Overall, I see this as a great potential weakness for municipal isps, and it's something I think the left & right might be interested in rectifying. It could be done municipality by municipality, with promises, but I for one think many people on many sides of the political spectrum have an interest in fixing this radical overreach & colossal corporate favoritism that was gifted by the Supreme Court.
[1] https://en.wikipedia.org/wiki/Verizon_Communications_Inc._v....
Building physical infrastructure isn't without environmental cost.
I don't think this is true really. There's been a really big shift in the last 50-ish years and at least in the US there seems to be a general consensus that projects of this nature are no longer the domain of the government.
I mean the telecom thing is a factor sure but I don't think you'd see that level of investment in infrastructure for anything else at this point either.