The size of the SE 2016 is just perfect for me. When you add to that my use case of phones (phone calls, messages, task management, calendar, reminder, quick notes, voice memos, siri, music, podcasts, homebanking) it becomes the ideal phone. I use my phone as a PDA. I don't game and I rarely use it for watching videos, for those tasks I have other devices, namely Ipads. Just for reference, I bought my first SE some years ago, but then I gave it to my daughter. Few months later I bought another SE for me (at the time I paid about 220 euros for it). Later I sold it to a colleague and bought the XR. I then sold the XR to my father-in-law and bought the Note 10 Plus. Later I bought the Iphone 11 Pro for my daugther and I'm back using the SE that was hers. I now have both the SE and the Note 10 Plus but, for my daily phone, it's the SE that I want, the Note is used more like a mini tablet when at home. For me there is no substitute for one-handed operation.
I thought I would by the 12 Mini immediately, but when I started thinking about it, me too became conflicted. I would have to paid more than 800 euros to basically have the same experience that I now have, while loosing on the grip on the phone. I have tried the 12 Mini and although the overall size is similar to the SE 2016, the fact that the screen goes all the way to the top makes a lot of difference. I'll be using that money elsewhere. Until the SE 2016 becomes unusable, this is the phone for me.