Because of remote work I am almost always close to my MBP, my Air, or a tablet. Car infotainment screens are good enough nowadays, and I don't need a giant screen to hail an Uber or paying something.
Giant screens are for me an habit I got when I used to commute hours everyday in a car or bus, it doesn't make too much sense nowadays if I really think about it.
1st generation SE had been discontinued long before the 2nd was released, but the 2nd was directly superseded by the 3rd, and you can still get the 3rd new, directly from Apple.
I find it impossible to hold the phone with one hand unless I add a cover.
Seriously, I have yet to find something better than polycarbonate for the phone body. It is durable, lightweight, can make removable covers, and let radio waves go though. So sure, it looks cheap, because it is cheap, which is great because it helps make for lower priced phones. And if you are going to put that phone in a case anyways, who cares about how it looks, you won't even see it.
Metal is nice too, I still prefer that cheap plastic, but at least, it is a durable material. But glass is just stupid.
Now I understand the premium feel. But why not go for fancy composites instead. Carbon fiber, graphene maybe. These are both premium and technically good.