I think y’all are being fooled by the new 4K transfer. It is not a filmout. Film looks significantly worse than this especially for digitally composited animation. This is 100% just a digital upscale with fake film grain and fake gate weave. All the screenshots look exactly the same as the previous Blu-Ray but darker due to the HDR obsession. There’s no reason Paramount would go back to scanning a filmout when the digital elements are right there. Think of the Jimmy Neutron movie and how that’s a filmout. It looks like shit because that’s just how that kind of content looks.
I think the UHD is very clearly film out. Paramount isn’t as incompetent with UHD remasters as you or others are making them out to be they clearly put effort into the UHD format. They likely scanned a film element as it would be a better way to make a 4K master from a 4K scan of an element than a 1080p (or possibly lower) digital element to 4K. It’s very common practice.
Remember Paramount recently did amazing remasters of Wayne’s World, Truman Show, and many other films where they restored or fixed elements from their original Blu-Ray format releases. There is more care in the UHD division than there ever has been. There is no way they would fake gate weeve or fake film grain that’s just a bad faith assumption