

One thing that I don't really mind but always notice about the Dune movies, and Villeneueve himself said he "Doesn't want you to see the inside of the spaceships because he wants you to focus on the ecology of dune"..
They don't really ever show any of the massively advanced technology the Fremens use. Like they live in the desert and move around and use knives but their stillsuits...what are they made of? Do the Fremen have labs and clean-rooms?Manufacturing facilities? Apparently you can make spice into lots of things but you never see any tech besides literally what desert dwellers on earth would use. In the books the Sietch have manufacturing and are basically self contained cities. I think it is more a lifestyle choice than they have limited tech.
Why are the Fremen constantly moving between their highly liveable sietches? Water also isn't THAT valueable because they have tons of it stored away...they're not gonna let someone die of dehydration if they need water..
The water they have stored away is part of the master terraforming plan that Liet Kynes put together for them to transform it from a desert planet to a paradise. I think in the book you can borrow water or take it from the vaults based on how much you have in there but they track it single mindly because the need X amount to terraform and that is the end goal they all work for.
