Boards with power circuits and micro-controllers. I'm not sure I would trust the routing software when it comes to a high-speed bus or radio just yet.
> There was no easy way to combine schematic and skidl-based circuits. This was a problem at a company environment where design reviews become impossible because nobody else could write their heads around a power converter circuit made in skidl.
You can output a schematic: https://devbisme.github.io/skidl/#svg-schematics
I haven't got a solution for half-and-half skidl and KiCad designs.
> I really like KiCad's backannotation feature for adjusting BGA fanouts and whatnot from the layout.
I've not tried this so can't comment on it.
The jitx folks used to talk a lot about making test jigs and adapters for people, which is a simple enough application that a text-based system could really shine at.