I know you're replying to
@el_super, but my reasoning is that Dumbo is the most easily retheme able out of all the Fantasyland dark rides. It might be too sacred now, but if the current Disney is willing to replace the Pinocchio murals made for the parks in Village Haus with sloppily edited stock art of Beauty and the Beast characters and replace The Old Mill miniature that's been at Disneyland since 1956 with Arendale, what would Disney be willing to do in 2035 or 2050 with something like Dumbo. It could easily be rethemed to whatever movie with flying things that they have at the moment. I wouldn't like it at all, but I could see it easily happening the road that Disney is going down.
I guess my question would be about the cost/benefit for such a retheme, even when Disney seems to be throwing money at retheming projects. I imagine even current Disney would look at that, shrug, and say it doesn't need fixing. Perhaps if we get to a point where the ride doesn't feature in nearly every commercial then they might change it. But Dumbo is about as well-appointed as such a ride could possibly be. Could Disney be Disney and out-garish it? I suppose, but, again, to whose benefit? The company may turn against Dumbo in the future, but it certainly hasn't now, despite what some internet clickbait articles might think. Dumbo is still very much a celebrated, iconic movie, and until that changes, I can't imagine the ride going anywhere.
I think the Pinocchio restaurant is a bit of a different situation. The Village Haus (or whatever the Disneyland version was called) was beautifully themed and iconic in the sense that there have been a lot of similar restaurants built in other parks, but it wasn't iconic in the way that, say, the Blue Bayou or the Plaza Inn are iconic. The food was at best passable theme park fare, and there wasn't anything notable there. The setting was *well done*, but I'd argue didn't reach icon status.
Similarly, I don't know that, for most guests, most of the settings within Storybook Land are iconic, and personally if one of the set pieces *had* to leave to fit in Frozen, I'm happy it was The Old Mill (a short that, while well done, no one except super geeks are familiar with, represented by a comparatively basic and simple miniature) and not, say, Pinocchio's Italian Village or the scene from Snow White. Tony Baxter himself has gone on record defending such changes, as small ways to evolve the park in a way that doesn't really hurt anything. For me, that particular change is a net upgrade (though perhaps they could tone down the "Let It Go" that still plays from within that set; I imagine 90% of the world is over that song by now).
Just my two cents. Granted, I'm not a local as many people here are, and invariably that skews my interpretation of what is and is not a sacred Disneyland space or artifact.