I think you would agree that there aren't very many nationalized
industries other than weapon systems research/development ("weapons" as in cruise missiles, fighter jets, air craft carriers, etc.) I think you would also agree that the on-paper-private companies that do this work are effectively nationalized would perform much worse if they were selling to citizens rather than nations.
As far as services (rather than industries), those that I mentioned are perfect examples of nationalized (or at least "shared" as opposed to owned by a single company) services that perform well: Highways, USPS, TCP/IP, DNS, SMTP.
Though, I do admit that despite being built on publicly developed shared underlying technology, the actual deployment of DNS services or of devices that use TCP/IP or similar technologies is done by private companies.
This is also sort of adjacent to the debate of whether or not broadband access should be considered a utility and how utilities should be delivered.