i definitely have brain fog, i will forget what im saying midway a sentence sometimes. i noticed that and my stutter while i was using, but it's definitely prevalent now after stopping. i can't tell you if it's gotten worse/better after I stopped. that could be due to the fact i didn't notice or care to notice. i think just overall, im slower, i don't know how else to put it into terms other than that. i retain less info, it's harder for me to focus, a phone addiction that is ten times worse. so definitely stunted my brain a bit, which im attributing that to my stutter. but i appreciate this, makes me feel less alone.