Doesn't need to be in 2018, I'm just hoping Apple doesn't kill off their 4" wonder anytime soon, if ever. The thought of using anything larger makes me ill.
My thoughts are the iPhone SE was a one time offering and the four-inch form factor/smaller demographic for iPhones is extremely minimal, given where smart phones have grown proportionately larger. I think the iPhone SE is a great phone for reasons we all know, but it’s also a global phone that’s affordable for many other countries that can’t afford an iPhone like the X or iPhone 8, which was Apples real intent for introducing SE in the first place.