Ask HN: What's your experience with floor desk?

I was sitting incorrectly for many years which resulted in almost permanent lower back pain. I also have a standing desk so I mix sitting with standing every day but after a few months my feet started to hurt. Now I work in walking/running shoes with a foam but I'd like to try something different as it doesn't sound like a solution.

My final idea is a floor desk which is not popular at all but sitting on the floor seems like the most natural position. Have you ever tried that or are you familiar with a comfortable floor desk setup?