I think BMulls post is pretty much spot on.....Tell me more about why Aqualoop is "the same" as Hydrocoaster.
Woah hang on a sec, so first you say you don't bother riding water slides, then you try and tell people who have experience riding a wide variety of slide types that they are "all the same".
For starters, not all slides are downhill...You might be propelled uphill by magnets like Hydrocoaster, or by powerful jets of water like Master Blaster slides, or just under your own momentum like Aqualoop. Some have you going uphill and falling back down in their own way, like Tornado/Kamikaze, or the "Boomerango" slides
.And even if they are downhill, it might be a moderate run like the Temple of Huey, or something steep and fast like the Jetstreams at WnW.Clearly they have to be different in intensity and experience, or else why are some people afraid of one but not the other?
Some slides have you bulleting along, some have you sloshing from side to side on the turns.
And of course, newer slides have elements that break up the normal chute from top to bottom...Toilet bowls, funnels, halfpipes, walls, "Megatube" sections.
Not all slides use a tube, some you ride on your back, like a classic flume slide like the River Rapids, so you have a bit of control, by arching your back and bending your body on the turns to go very fast. Some have you riding on a head first mat (racers...And ive been on the Mach 3 slides at WnW Orlando which use them too), some on a conventional inline 1/2/3 person tube, facing forwards, some on a circular raft that can spin around (so think of it like the difference between a normal coaster versus a spinning coaster)They all feel different.
In some parks, you do see a couple of slides that might be similar..The black hole and sidewinder slides at WnW are basic forward facing tubes (Though black hole is pitch black inside, so hey, it still manages to be different), though this tends to just be a case of having enough slides to meet demand.
But at WnW and WWW (And Jamberoos/WnWSyd plans do it well too), but I'd struggle to name more than a couple of rides at any of these parks that are too similar.
Water parks need to build new rides to keep people coming back, and 90% of times the choice is a water slide.
There is also the capacity argument, Wet n Wild is very popular, so needs as many people eating slides as it can get.
Finally, this slide offers something new...Those helix elements are really cool.
I can see what you are doing, refering to "plastic walls" makes it sound really cheap and nasty", "sit in a tube till the splashdown" just makes it sound like nothing at all happens along the way and its completely emotionless like sitting at a bus stop.