Nothing changed. I’m not sure what you were expecting would change - the only difference was that instead of driving to Dover, putting your car on a ferry and then getting off in France, you’d drive to Dover, put your car on a train and then get off in France.
The Eurostar passenger services started a year or so later iirc, but again although it was fun to be able to take the train to Paris rather than taking the plane or boat, it didn’t really affect anyone who wasn’t travelling to Paris anyway.
Nothing changed. I’m not sure what you were expecting would change - the only difference was that instead of driving to Dover, putting your car on a ferry and then getting off in France, you’d drive to Dover, put your car on a train and then get off in France.
The Eurostar passenger services started a year or so later iirc, but again although it was fun to be able to take the train to Paris rather than taking the plane or boat, it didn’t really affect anyone who wasn’t travelling to Paris anyway.