Disneyland relies on people's nostalgia to keep them coming back. If they change the rides then it threatens that fragile system. Especially as most of their modern stuff keeps failing to draw enough audience to meet its cost.

I know the only ride that would have ever drawn me back, Extra-TERROR-estrial the absolute most terrifying thing younger me experienced, was replaced with a goofy Stitch ride decades ago. Nothing else was worth the time or money.