The bad part of that is, everytime they've rolled out a new network, first analog to digital, digital to 3G, 3G to 4G LTE, and now 4G LTE to 5G, the reach of the signal from the towers decreases. Analog had a range of around 40 miles, 3G got around 15-20 miles, and 4G LTE gets around 5-15 miles. That's according to a Verizon engineer when I asked why my signal level at my house has dropped since I first got service with them. Most people in a city don't notice it because of the saturation of towers, but in a rural area, it becomes apparent pretty quickly.
If Verizon doesn't start adding towers, their map is going to have a lot of holes in it. To be fair, the current map doesn't show the actual signal footprint, only where they CAN offer service (again per a Verizon engineer) which is what Verizon ridiculed Sprint for on their map disclaimer (the ad with Ricky Gervais).