CoreOS vs Anaconda toolchain

Hi, I wanted to link this here:

https://github.com/coreos/coreos-assembler/issues/91
Most importantly starting from
https://github.com/coreos/coreos-assembler/issues/91#issuecomment-422830233
and the most recent ones.

Would love to do some brainstorming about how we can share more code/ideas in general; I had some specific comments towards the end.  

One thing not explicitly noted there is how key Ignition is to FCOS (and derivatives like RHCOS) - having a common language that works in both bare metal as well as e.g. AWS and Azure is a big deal - and today the OpenShift 4 installer and the [machine-config-operator](https://github.com/openshift/machine-config-operator/) are built heavily upon it.