I actually don't know the answer to this, but has the Hollywood Mummy gone under the knife for an extended refurbishment in the last ten years? Most coasters have expected service lives of approximately 20 years when they're run year-round, but those indoors tend to last a bit longer since they aren't exposed to the elements. It's unclear to me if ROTM West is still running on its original, mid-aughts computer equipment, or if it at some point was overhauled to a new ride/show control system.
If it's using relatively modern equipment and they've patched the tracks over the years, I could see them getting this to 30 years (though again, not an expert). If it's still running the old tech...