no jail support on linux..

you miss the other point of Docker: cross-platform dev (and only occasionally cross-platform deployment)...

I can run same set of docker containers that make up an app, including scaling multiple instances of each container, on (1) my macbook, (2) my ubuntu linux laptop, (3) my centos server (4) my windows laptop, (5) my other windows laptop, (6) my client's windows server.

I can do this without bothering to configure my app specifically, or without even knowing or learning what the dependencies of my app are!

BSD's are the "loner children" playing by themselves while everyone expects to have everything running everywhere and expect it by default...

Sorry, but unless effort is made to embrace kuber and docker, the niche will shrink.

One way out of the problem is to have entities like the FreeBSD foundation the OpenBSD devs invest effort into Docker development to make it capable of running BSD containers inside it... but this will never happen because of endless ego :|

... all 6 of which were running a linux vm until recently, and still predominately so (windows containers are hugely niche and have just about as much 'loner children' baggage in the larger commmunity)

writing a gui to spin up the VM flavor du-jour with one hipster command that you can show in an animated terminal in your bloated website doesn't make something cross platform underneath the hood, and that same VM runtime could run just about anything else.

and no, i don't miss the point. you miss the point - you are arguing market share as if it is technical merit. I'll take 1 true school unix hacker over 5 million 'noders' who cant debug their super hip k8s clusters they provisioned 'in the cloud' with wget|sh when they break.