Some comments:

1) Take Shelter is an interesting film. I'd like to give it another watch.

2) I am firmly in the pro-film camp, and lament the loss of 35mm as the standard format, both in terms of projection and filming. There is a very clear difference in quality, which is particularly noticeable on digital versions of films shot in 35mm (or 70mm). I really miss real film, and it's a crying shame one can only see it at very few venues.

3) As Martin Scorsese has pointed out, although he is pro both formats - digital and film - the real concern is preservation. Films shot over a hundred years ago have their negatives preserved in appropriate cold storage, so new prints can be struck (and digitised). However, material shot on digital sits on hard drives which can break down, and then the material is lost forever. Some directors who have wanted to revisit their films to re-edit have found corrupted hard drives, so that's it. Therefore , ironically, to properly preserve digitally shot material, it needs to be transferred to a 35mm negative and stored.