Lazy loading sucks. Especially the JS implementations of them -- it's almost as if the <img> tag is some hyper-advanced new addition to the HTML standards that not everyone uses yet. I also hate low-quality temporary stand-in images. They're all about making a page "look" full without actually providing any function or improvement to the user; ie I think they're vanity. Not once has a blurry image in an article or post ever given me any value. "Page-res" versions that link to high-res versions work, but "thumbnail" res versions only works if your pictures are unlabelled and the user needs to sift through dozens to find one (ie an album rather than a standard webpage). Otherwise they're useless, the user knows the context of your image and wants the actual detail, not a vaseline smeared photograph.