Re: SE sized devices
Erm, nope. I don't think that it's true that demand has evaporated for the SE form factor (although, admittedly, I don't have anything apart from anecdotal evidence to back this).
The SE is relatively well-priced for the specs; the battery lasts two days (at least, mine does); it can do most of what premium phones can do including making phone calls; it includes a pretty good camera; it looks like a 5S so it's presumably less likely to be tea-leaved by someone; and - guess what? - it fits really nicely in a pocket.