Also, 20k was a tremendously good ride. There's no comparison between it and what resides in that space now; LM and 7DMT combined aren't 10% of the ride 20k was.
With that said, it was incredibly impressive -for its time-. I rode it in the early 90s (and probably late 80s, but I don't remember that) and was blown away, but the ride would have needed a significant overhaul to still be a feasible attraction today. They likely would have needed to replace every single show scene, which I assume would have required draining the whole lagoon.
It's just a shame that they didn't build something equally impressive in that space instead of what we got.