Indeed... I want one too! Pocketable rotary dial phone? Just, $400 can cover a lot of other things.
I consider carrying something like this (I carry an AT&T Flip IV at the moment if I remember the thing) to serve as a reminder to other people that not everyone has, nor wants, smartphone-type capabilities. At the local farmer's market last weekend, a number of various political booths (on all sides of the spectrum) had "Sign our petition!" type signs - as QR codes only. My device doesn't decode QR codes easily, nor will the browser handle a standard website very well. I typically carry a laptop, but they don't print the URLs...
Of course, then there's the problem of being on the fringe and the absurdity of "And therefore follow us on Facebook, Twitter, and a bunch of other big tech platforms!" - I point that one out often enough too.
I'm at a position in my life where there's really no downside to carrying "the weird alternative" and showing people that, yes, I do in fact continue to exist, can have phone calls, SMS text, and basic maps, while not feeding into the horribly human-toxic ecosystem that modern smartphones have become. I mean, I can even use Bluetooth to the car for making phone calls, or play music from my SD card to a Bluetooth speaker! But I don't have email on it, I don't have any social medias, the games are crap and I don't bother with them, etc. It's a minimally functional device that I end up leaving home a lot because I just forget about it - and that, coming from the smartphone world, is a huge improvement.
I get a lot of positive reactions, too - most people simply haven't thought about the fact that the smartphone is really only 10-15 years old for most people. We lived before it. We will live after it. And life is objectively better without one now.