I have a LG Gram 16Z90P in white colour, have kept the battery charging locked to 80% since the start and the battery health is excellent, battery wear level is at just 1.1%.
The screen is in excellent condition, zero dead pixels and brightness is same as new.
The white paint used by LG is good, no chipping/bubbling or fading or yellowing.
Fingerprint reader works as good as new, no change. I have kept the laptop on Windows 10, have added 2TB SK Hynix P31 to the second SSD slot.
Keyboard is in good condition, no stuck keys, some frequently used keys show signs of oil which is expected on a white keyboard.
Touchpad is as good as new, palmrest is also in excellent condition, the white paint used is fantastic.
The Gram chassis is strong, I move it around daily from desk to sofa to bed and have also travelled with it in a laptop backpack with zero issues.
conclusion: I am very happy with the LG Gram 16, no complaints, I plan to use the same laptop for 5 years and will keep updating the thread here.