I think you're right, I normally order from Ag or Mathers now because of the deletion of 4x5 FP4 and a couple of other lines from 7 day webshop.
Its nice that Matt at Ag will actually pick up the phone and talk to you so I think in future he'll get my business, 7 day were good for ordering a couple of rolls of film you'd rarely use like Portra 800 which Ag only list in 5 packs.
Still declining markets, mean less options I think getting behind people like Ag is the way to go.
More recently I've been using 7dayshop just for odd items, films for tests etc. It doesn't really make sense to order 40 rolls of Delta 100 from 7dayshop for example.