XDG was added somewhat quietly almost two years ago now. It was announced on www.vim.org but that was it as far as I know. They don't keep news that far back

XDG was added somewhat quietly almost two years ago now. It was announced on www.vim.org but that was it as far as I know. They don't keep news that far back but here's the commit: https://github.com/vim/vim/commit/c9df1fb35 https://github.com/vim/vim/commit/c9df1fb35