I agree Speedway is a classic, but time has not been kind. The ride format is very dated and the placement in the park no longer makes sense.
I hoped this would come up. It's outdated, overshadowed by a real life safari existing in AK, and would't greatly benefit from a refurb. All very similar to reasons I listed when advocating for replacement of Universe Of Energy in an earlier post. What I feel like saves Jungle Cruise from being a "Universe Of Energy" is that it's deficiencies are blatantly acknowledged by the ride operators and cast members through tongue-in-cheek humor that transform it into a ride that doesn't take it self too seriously. This is one of, if not the only case, you will see this in an attraction at WDW.