What is the use case here?
My assumption this is more performant than sticking something in VirtualBox (purely assumption).
Could be handy if you have an industry specific Linux only GUI app and give out remote access to it.
I'm currently a bit of a fan of the LinuxServer.io stuff. I'm clueless about docker and they have packaged many cool open source applications. So far I have used one, and it just works.
And the people on discord were quite helpful when asking docker questions.
I first noticed/made use of their Firefox container as a 'headless' browser env. Super useful for browsing through severe amounts of JS to get at a file :P