For what is worth, I am fully convinced that (1) (the paper-like visual feel) is completely true, not a snake-oil claim, even if it is just a perceptual placebo

For what is worth, I am fully convinced that (1) (the paper-like visual feel) is completely true, not a snake-oil claim, even if it is just a perceptual placebo effect that is masking the ostensibly true nature you described. Placebo effects matter ;) I guess I should also have added (4) this tablet is a lifestyle and fashion statement about having the disposable income to use it instead of an actual high-quality paper notebook.