Hmm. Are there actual known issues/dangers to this?
My one issue with the phone is that it will occasionally (on average twice a week?) reboot of its own accord. The reboot is fast so it’s not been a major issue, but it could be. No idea if this is due to LineageOS or firmware/hardware. [EDIT: there seems to be plenty of info on this]
Yes. And you can just about reach the whole screen with one thumb, speaker quality is decent, etc 
But I can’t really compare - only had one small smartphone before the FP2!
I wasn’t aware of such products. Thanks @Geron for the idea, and thanks @rkbwde for the application tip!