I’m pretty sure anyone who’s said that it would be high cost has said that it’s because of the mechanical issues, not because they’d rip out everything that exists. Even in the storylight version, most scenes just looked like they were going to be plussed with projections.
Also, while I’m glad to a certain extent that the storylight version isn’t happening, the narrative does need to change a bit if they’re going to keep going in this direction with attractions throughout the park. Right now, it’s a thesis statement with a dwindling number of supporting arguments. If the re-framing is something along the lines of “how the human fascination with discovery, nature, and culture shapes the stories we tell” then SSE needs to do a better job of connecting those dots.