"We" decided we wanted this, so its just a reminder of what to expect in the future.
In the short term, use other ports. Simples.
Nothing to do with 15 million people all going on holiday on the same day then...
Unlikely. How many people, realistically, go to French France compared to elsewhere? And out of those, who would be insane enough to do Dover <-> Calais ?
Lots of them, because for many of them it is still the quickest, easiest, cheapest way of getting to France. Living 40 minutes from Dover I'd be crazy to go to France any other way. Now that she's retired and the advantage of a night crossing after work doesn't apply, my aunt considers Dover Calais a better route than Plymouth Roscoff. And she lives about 3 miles from Plymouth docks.
Isn't Dunkirk often cheaper?
I guess it depends where in France you want to be, as to whether its worth the hassle of Dover (the vast majority would have to suffer M25 and M2) and ending up in the worse shithole in all of France (Calais). On the upside, its easy to get a safe distance from Calais within 30 mins or so from driving off the ferry - depending on whether their Passport Control plebs could be arsed to turn up for work.
I used to be a fan of the tunnel, but grew weary of their delays and invalidating tickets on a whim, and forcing you to pay full price for a new, valid one ( > €200 each way), which makes them bloody expensive.
Done Portsmouth <-> Ouistreham for the last couple of years, which although a 5hr crossing, actually saves a bucketload of time and driving - not that driving in France is tiring, as you know - if needing to be over that side... ...even if it does mean dealing with all the retards on the A34. And if a daytime crossing, the cabins are only about £15
Having been forced to spend a night in Calias once, I'd be delighted to never have to go anywhere near that place ever again.