Swedish 99Kronor.com decides to ignore the power of HTML completely. Their website is just one huge image with an image-map for the links. That one image is heavy to download and takes 15 seconds to download on a 56K modem according to Web Page Speed Report. This is considerable more than a few of their competitors I looked at as well.
The biggest problem is on the other hand that the pages are completely in accessible on basic browsers like mobile phone or PDAs. Blind or visually impaired people might as well give up on it. Not to mention the hassle in the future when they want to redesign things or change the content.