I use this on several of my sites as well. None of them get any significant amount of traffic, so I figured it would be okay to add more names to the list, as a small token of keeping their memory alive.

Browsing the web with the Clacks Overhead extension for Chrome (https://chrome.google.com/webstore/detail/clacks-overhead-gn...), I'm always surprised by which sites enable this extension. My latest find is arXiv.org! If you go to any abstract page, such as https://arxiv.org/abs/hep-th/0310077v2 (picked that one at random for its humour), the header will be sent.