I run Docker on an X96 Air and H96 Max X3, both headless. Very stable, X96 Air runs a little cooler than the H96 but I can only get 100Mbps ethernet to work (as there is no device specific dtb) vs 1Gbps for the H96. These things are so cheap that you can run multiple of them so it's not a big deal if one fails (which hasn't happened for me yet). I only need HDMI, ethernet, and USB so don't care that sound, wifi, and bluetooth may not work.