The trouble with other EV brand startups is that they are just startups with no charging networks.
Only Tesla has a well developed network of Level 3 fast charging stations all over the USA (and Europe).
Other non-Tesla charging stations are almost Level 2 types which will only allow about 40 miles of range added per hour at the best. A Tesla can use these in a pinch and there are lots of these too.
This is fine for at home overnight charging, but inadequate for cross country use.
The Tesla GPS system along with using their iPhone Tesla app, shows SuperCharge stations along and near your planned route. It also shows number of now available charging stalls and what food, rest, and lodging stops are nearby. In general, its about one half of hour charging time to get you another 200 -250 miles down the road. Unless needed it recommended that you keep the charge between 20 percent and 80 percent to provide longest battery life. Note that the battery is guaranteed for 8 years even if you don't follow their recommendations.
Frank
Frank