Re: SE is more than large enough
I very much doubt it will be dropped, they've pointed to it as part of the reason they've been doing better in India. Unlike China where everyone likes giant phones (even the plus is a bit small in that market where phones are up to 7") India prefers smaller ones. The fact it is also a lot cheaper sure doesn't hurt either.
Dunno if it will get yearly updates, might be more of a two year cycle, but I'll bet it continues. Reportedly they are working with someone on all-screen LCDs (i.e. not edge lit) which I'd have to assume is for the SE, since going back to LCD after going OLED seems unlikely. So maybe in a few years there will be an SE sized phone with a 5" screen.