"What the author means is that switching to this phone will, over time, have significant effects on the way your brain works."
The author said nothing of the sort. What he meant is being read in by you.
But let's assume that's right since it's not unreasonable. In what way is the phone uniquely able to do this? The author didn't say.
You can choose to limit what you do with any phone and every phone has an anti-distraction button otherwise known as a power switch. Also, flight mode seems to do a lot of the same things.
No, this phone accomplishes something unique purely by how crappy and undesirable it is. The UI looks like shit and the function is terrible. That's not a sensational headline, though.
"Does daily smartphone use have profound effects on the way your brain works?"
Not if you don't use one, and this device discourages you from using one. That's all.
I will also say that I do not use a smartphone in the way described and it does not have this "profound effect" on me, despite the article's author asserting otherwise. I'm not claiming any special power either, I'm an old, long-time computer user; I use a desktop many hours a day and a smartphone almost never at all. I have one in case I need one and am away from my computer. Smartphones don't rewire me.
'You might disagree with that hypothesis and you're free to argue against it, but it's not something that can be just dismissed as "ridiculous pseudo-scientific nonsense".'
And here you are either intentionally or unintentionally misrepresenting what was claimed. The objection doesn't regard all smartphones, only this particular one. It's not just a difference, it's a profound difference. And "rewiring" is colorful language as well, the person you're responding to seem to have particular objection to that terminology. It is definitely hyperbolic and probably false. There is something in the brain analogous to "wiring" and "rewiring", that almost certainly ISN'T happening with this device.
And I'd like to mention another egregious thing in this article. This guy first asserts his credentials by claiming 20 years relevant experience with smartphones. I call that. a youngster. I personally have far more experience than that. Second, this guy claims that simplifying is his holy grail, yet he talks about "his" e-readers. Come on! Anyone who thinks an e-reader is an important, differentiated class of device is not qualified to tell anyone about the importance of rewiring your brain. It's a bullshit sales narrative, nothing more.