Hello David, thank you for the quick response.
Obviously you are right. One doesn't need to flash the film anymore. But then again if you are Hoytema (or anyone in his position really) i guess you can be as purist as you want in your approach.
Now concerning the washed out look i agree that smoke played a big part. But there are scenes that made me think that something else is at play too.
For example in the screenshots i have attached i don't think there is smoke in the scene. Yet the image has low contrast, possibly diffused highlights and a lack of resolution. I may be underestimating the latitude of film but i am not underestimating its clarity so that is why i guessed that there is some sort of lens filtration.
Whatever it is it's subtle and that is why i like it.