its in v71 (which doesn't appear to have reached the gnome extension store yet), and the normal application blur is still here too. Of all the wrong things Microsoft has done with Windows, I've really really liked the idea of only blurring the wallpaper to give apps a touch of color without slowing down the system too much, because this so far feels a lot more performant than normal app blur. I'll chuck this onto my PostmarketOS chromebook to test how it is on low end devices too of course.