Science

Definitely this. I’m a mid thirties guy so I remember the time before smartphones, I forgot so much stuff I used to be able to do… navigation being the most egregious example. Can’t find shit any more unless I’ve been there a few times already, I always whip out the maps app

Hi I'm a neurology professor that studies healthy aging.

Anyone who tells you blue light does anything but keep you awake longer at night is either ignorant or is trying to sell you something (like blue light filtering lenses that do nothing). You should reevaluate where you got that information.

Blue light does not cause harm, that is a myth perpetuated by eyeglass corporations to sell you a product. You get more exposure to blue light from the sun than you ever will from your device screens. The only impact blue light has on you is interrupting your circadian rhythm.

and in terms of "memory" the article explains it:

This was because using the device shifted the way that people used their memory to store high-importance versus low-importance information. When people had to remember by themselves, they used their memory capacity to remember the most important information. But when they could use the device, they saved high-importance information into the device and used their own memory for less important information instead.