Eh, T-Mobile has deployed a ton of mid-range 5G that covers big swathes of metro areas and now Verizon and AT&T are doing the same. It's true that the millimeter-wave 5G -- which is all Verizon and AT&T had deployed before this year -- reaches very few actual users because its range is so limited, like 2 or 3 city blocks and barely able to penetrate into buildings. But that's not the case with the midrange 5G (which T-Mobile has a ton of thanks to their acquisition of Sprint).
Obviously, the best-case scenario for consumers is for DISH to build out a big nationwide 5G network to provide greater competition and better prices for consumers. But again, I don't really know if that's ever going to happen. And if it isn't, then consumers would be better served by the FCC yanking all those unused spectrum licenses from DISH and auctioning them off to the big 3 so that the spectrum can actually be used. Which is why there are deployment deadlines on spectrum licenses. If DISH doesn't follow through, the FCC probably isn't going to find anyone else to step into that number 4 role. Although perhaps they could get Comcast and Charter to team up to buy and build out some of the spectrum to make less reliant on Verizon's network and make the wireless industry a bit more competitive that way.