The plan to put superchargers within range of 98% of the population does not mean I will be able to use superchargers to reach every place I want to go. For one thing, many of the places I want to go are precisely not in cities. They are remote areas where the population is very sparse. Superchargers can cover 98% of the population, but still leave out many of the most desirable destinations. Moreover, "within range" means about 175 miles if you go by the circles TM has drawn on its SC map. But to use these superchargers without supplemental charge stations, I must be able to get from the supercharger to my destination and back on a single charge. If I plan to drive around a bit in the vicinity of my destination, the supercharger must be even closer. To really cover the U.S., the circles around the superchargers would need to have a radius of about 100 miles or less, and even then I might not be able to drive my preferred routes. Roads are not always straight, and using the supercharger would frequently take me out of my way.
For these reasons, like it or not, we will need to rely on supplemental charge stations for the foreseeable future. I believe this means at least 30 amp stations at overnight accommodations, and preferably high amp stations at stores, restaurants, and everywhere else.