I've noticed that a lot of blogs in the rationalist diaspora lack favicons. This often makes it difficult to navigate tabs for different blogs, PDFs, ect. A favicon takes <15 minutes to make, saves your readers time, and improves your appearance. A win-win-win.
Maybe people think it's cool to have no favicon, or they want to stay on the down-low, or are ultra-minimalist, but, like, seriously?
More likely that this just doesn’t occur to people and/or they have no idea how to make and install favicons, and possibly don’t even have any concept of how favicons work and where they come from.
Don’t underestimate the technical cluelessness of people on the internet, even ‘rationalists’.