Utterly insane.
I replaced my SE with a Sony Xperia XZ2 Compact yesterday. It has a 5" screen and decent specs (2018 flagship). About as small as you can get a mobile nowadays, sadly.
And wow how I've missed Android, the UX is soooo much better in most aspects. I can't believe I was stuck with iOS (as an experiment) for almost 1.5 years. Reason being that I hadn't been able to find anything below 5" in the Android world.