Any trip near or over 300 miles.
Range is relative. It all depends on the use of the vehicle that dictates how a long trip over 300 miles may impact the drive.
For example, with 90% of Americans commuting to work daily, with a round trip of less than 50 miles, a 200 or 300 mile EV is the best replacement vehicle. Especially with the 75% reduction in fuel costs, or about the equivalent of 4 gallons(about $20 in electricity) to travel 320 miles. Compared with the $60 to travel the same distance in an ICE vehicle. That's a $40 savings weekly on fuel costs or over $2,000 annually in savings on fuel alone. The fuel savings along could just about pay for the monthly lease of the EV. Then deduct the maintenance savings over 3 - 5 - 7 years of ownership and the EV can actually pay for itself in savings.
Now for those that travel over 300 miles on a regular basis, nothing much changes, because today, most have a smaller car as a daily commuter and a larger vehicle/SUV/Pick-up for longer trips. They would just keep the larger vehicle for longer trips, and replace the smaller daily commuter car/cuv with an EV and benefit from the fuel/maintenance savings, along with better drive-ability. Then there are those with the 300+ mile Tesla today that can charge at a Supercharger while having lunch, dinner or resting for the night before starting out in the morning. Driving an EV is a smarter drive than with an ICE vehicle, where the vehicle knows where it needs to charge and what route to take to makes sure it get there can based on the route/destination. The only way this gets messed up is if the human decides he/she knows better and tries to outthink technology...then it's on them. Thousands of people do 300+ mile trips every day in EVs.
However, those who only have the one large SUV/Pick-up, will just keep driving that and pay higher fuel prices, higher maintenance fees, along with annual emissions testing fees. But Ford is to offer a hybrid for that demographic to lower those costs. This is only until the larger vehicle transition to EV which has to happen.
So the only way a person could be 'concerned' about a 300 mile trip in an EV, would be if they just don't know enough about EVs in the first place...and for that consumer, an ICE vehicle is their best option.