It adds at least an hour to a long trip already. Plus, it isn't guaranteed that the stops will be in optimal locations for the route, so it could likely be 3 stops.

The biggest issue with fast charging on trips that I've encountered is actually getting to the chargers only to find all of them in use and a queue of cars already waiting to charge. So that 30 minute charge turns into 30-60 minutes of waiting for a 30 minute charge.

Fast charging for a trip is still not anywhere as easy as finding a gas station. Stopping for 30-90 minutes every 3 hours of driving make those long trips feel maddeningly longer.