It does have promise. I am planning on doing more with MOS.
Very simplified interface compared to ProxMox, but that can also be a good thing.
I am not very familiar with Docker, and needed to ask for some help from someone more knowledgeable, but it seems that Frigate NVR deployed with docker on MOS is working well, complete with video storage on an internal HDD.
I have not been a big fan of Docker, but I can see how it can be useful. MOS can do Docker, LXC containers and VMs.