I’m on vacation with a rented Tesla Y LR in Tuscany right now. We traveled all the way from northern Germany (about 1500 km) and never had any issues finding a free charging station. Just once every single parking spot was used and the charging automatically stopped at 80% in order to make space for others more quickly (and to be honest, this was due to other cars parking in the Tesla reserved parking spots at an Italian supermarket).
Traveling with kids automatically makes you take a break every 3 hours or so. This time, we just let the car charge during these breaks and had a 100% charged car afterwards. That’s about 55 min of charging time. In about 25 min you can charge from 20% to 80% using a 250 kW supercharger.
You have to keep in mind that long distance travel is not the usual use case and that being able to slowly charge the vehicle during the night is also important. Most camping sites, hotels and vacation resorts offer at least two 11 kW stations at their own rates.