Once upon a time....
Many municipalities had their own ISP including infrastructure. The big guys sued on "unfair competition" and made the usual promises of high speeds, reliability, and connections for everyone. If they didn't win the lawsuit, they just raised their rates to where the users in the cities couldn't afford the ISP. Well, here we are now... poor service, lousy speeds, and high prices because the big guys can "compete". They won't connect to rural areas or anywhere it might be a tad unprofitable, but hey... they're the good guys and they're still promising the green pastures to all who listen.
And now, we have (other than Google) non-ISP companies backing this idea of muni IPSs. The big ISPs are strangely silent.
Reminds of the shenanigans the major power companies pulled with muni-owned power companies.