While I agree with a lot of what you said, this part is definitely not true. While there is a lot of people (especially on the message boards) that are always calling for its removal, there is a lot of people that will also be upset when they remove this attraction. It will go both ways here. And the new cars area doesn't look to give the same experience (not that it is a bad experience).
Probably the biggest reason I don't care as much about it will be the fact that by the time they do remove it, my kids will be old enough that it won't matter to me as much any more. Yes, there is other parks with similiar attractions, and it makes a lot of noise (even my wife said she doesn't like the attraction a lot...but loves doing with with the kids cause they love it so much) - but I would argue that somehow those similiar attractions never hit the same high note. My family has traveled to a lot of parks around the country, and done many of these similiar rides, but somehow it isn't as special. But a lot of that is nostalgia talking. I did it with my father, I am doing it with my son. It is an experience we never miss with every trip. It is not the best ride, but for some reason the kids end up with the biggest smile and the photo ends up in the vacation scrapbook (yes we still do those).
But as I said, I won't miss it as much, because by the time it happens my kids will be older and looking for a bigger thrill and not wanting to have to go on that "dumb" ride with their dad.
(long story short, we will have a 1,000 page thread again when they remove the tomorrowland speedway with people arguing both sides as usual - but I will be one just reading remembering all the great memories of that ride just like I feel now about TSI).