Perhaps not "use", but the site where I publish my hobby software, still uses a design made in 1999. Slightly updated (now it uses CSS!) but still the same table based layout :-) Why? Well I guess have better things to do than constantly updating my site with the latest trends. It does its job. It's not mobile friendly, but my audience is mostly using a PC anyway. Somehow I imagine that it portrays an image that a my audience appreciates and matched my software.