Yep - are you apologizing for them, or for yourself?

This sounds like a sleeping disorder, imo.

And no, ADHD medications do not make you immune to brain fog. In some situations they can make it worse, especially when they wear off.

Ask your friend if they’ve been checked for sleep apnea.

They’re expensive but not really overpriced. Boox tablets are essentially Android tablets with highly specialized screens.

Eink screens (particularly high refresh rate screens, like what you’re looking for) are still a relatively new tech and don’t have the cost benefits of more matured technology like LED/LCD. The cheap eink screens you see have very slow refresh rates and don’t offer the same pixel density, with harsher gradients.

I’d reccomend getting one used, or waiting for a seasonal sale. I’ve had one for a while and I love it.