There are some things I sort of need that are cheaper at No Frills than at Loblaws. But I'd have to specifically walk to No Frills, while Loblaws is on my winter TTC commute. Result: I'm letting stocks run down because it's not urgent yet.
(In non-winter conditions I would get these things from Fiesta Farms, because I don't mind paying more there, but that requires bicycle commuting conditions.)