Understood. But no, you assume wrong. It takes like a couple of seconds to notice the difference between QHD and FHD. Who the F uses a 720p display in this age anyway.. The iPhone 11 display isn't 720p anyway. My point was, as now I'm using a display of 396 PPI yet my last 3 devices all had QHD displays (above 500 PPI on both the Pixels), while it's pretty noticeable the less-crisp texts from up close it still doesn't bother me in the slightest. Nutshell is I'm pretty fine with 400 PPI coming from 500+ PPI. But that doesn't mean i may be fine with 326 PPI. There's a bottom out point for every user, i just don't know mine. The biggest plus for me is i never watch any movies or any other content consumption in my mobile phones, only some YouTube here and there.
I'm very sensitive to these things. I feel dizzy when frames drop below 60 to around 50 or below in games. In less than 30 mins i feel nauseated where i feel like my brain sucked out of all the oxygen. Yet 90% of the people are fine with it. Like I said, there's a bottom point of every user you just need to find that.
You just reminded me of an extremely good point though, that of the sub-pixel structure part. I keep forgetting that. I'll pick an LCD over AMOLED any day.