Freight as in rail freight could be electrified over time. The engines today are already electric, it's just that they use Diesels to provide the electricity. Electric motors are an effective means to deliver torque to the wheels gradually and effectively, no wheel spin now. One could modify these engines with pickups overhead to shut down the Diesel where power is available.
Airplanes of course are another story entirely. The wife was checking how to get from Paris to Marseilles the other day and told me that flying our of Orly was cheaper than the TGV, and faster. She later said we probably would not make that trip for other reasons. Sometimes the airport of course is out of the city when the trains drop you off inside like Gare du Nord versus CDG.
The trains in France have been largely shut down by a general strike, we're hearing it is a real mess right now, and she wants to go into the city one night. Yuck. We're driving, traffic may be worse than normal. I do not care for Paris.