To be honest, I've never really understood the need for a stand alone reader.
I read a lot of ebooks, but it's almost all on my laptop with calibre. I tuned the color scheme to be easier on the eyes at night and it's honestly fine. I used to have a kindle, but I lost it in a move long ago, and haven't really missed it.
Different strokes for different folks largely. My e-reader mostly languishes in a drawer. I'll maybe use it on a trip or around the pool but mostly do my reading on regular computers and my phone as those are what I have handy. My wife loves her e-reader and uses it daily but doesn't really bother spending much time on a laptop or desktop outside of work. To her, it's a better device more catered to precisely the needs she's looking for, while for what I'm looking for its too constrained.
It's a matter of preference I guess. I do find eink substantially easier on the eyes though. Plus the form factor is better for lying in bed while reading