... While I too, am annoyed by the fumes....
I have to say... I'm kind of glad the speedway is staying... simply for the sake of nostalgia.
With so many of the "Old" attractions being removed and replaced, 20,000 leagues, Mr. Toad, the original Snow White ride, Mickey's toon town, etc.....
I remember riding these go carts with my dad way back when I was seven... and in part still ride them because I remember riding them with my dad.
And when the line is at a low wait time (20 minutes or so) ... and just as I still take a whirl on the teacups to see how fast I can spin... I also still get in line and take a whirl around the track... out of Nostalgia.... And I still enjoy it. Its actually nice ride in the evening after its cooled off.
Yes the steering is difficult, but that's part of the challenge and the fun.
I would guess that this ride might have some staying power because its ability to manage crowds in that part of the park.
The ride is relatively high capacity at 40 or so cars circulating around both tracks. There are ALWAYS cars coming back in as fast as they are leaving... so even with a long line, because the exchange is continuous, the turnaround time is quick. Not to mention its still a bit of a longer ride to ride because it takes 5 minutes or so to maneuver your way around the track.
That's a lot of people who _are not_ in line for space mountain, seven dwarfs mine train, and peter pan. This also makes it an easy "filler" in between fast passes, especially if you are wanting to stay in that area of the park.