Is Regulation Still Shaping Competition?

I was recently reading some older regulations related to copper, and this reminded me how regulation was used for many years to shape competition, or to be more precise, regulation was used to protect monopoly providers from competition. It got me to ask the question if regulation is still doing the same thing. Federal regulation of telephone began with the Mann-Elkins Act in 1910, which classified telephone companies as common carriers. The federal government stepped into cable regulation in 1984 with the Cable Communications Policy Act that explicitly recognized the authority of local governments to manage cable franchises and solidified cable companies as exclusive monopolies. Broadband has only ever been saddled with minor regulation, although you would think they are regulated heavily by listening to the biggest internet service providers. There has never been any attempt to regulate rates, although there are regulations related to consumer billing rights, privacy, and things like broadband labels.