[Eduard]

> The blurry thumbnails have 2 issues 1) trick person into thinking they're loaded

But is _not_ showing blurry thumbnails during image loading any better in that regard?

- an empty area would give the false impression there isn't any image at all

- a half-loaded image would give the false impression the image is supposed to be like that / cropped

- if e.g. the image element doesn't have explicit width and height attributes, and its dimensions are derived from the image's intrinsic dimensions, there will be jarring layout shifts

> 2) have a meaning that content is blocked from viewing

For you maybe. And even when so, so what? Page context, users' familiarity with the page, and the full images eventually appearing will make sure this is at most is only a temporary and short false belief.