Maybe this is of interest to some people here. I'm writing a simulation server API which allows you connect to different simulators and do easy processing on the data. One use could be to write testbenches for your HDL or Spice designs in any language that supports Cap'n Proto, for example Python or Rust. Another use could be to verify a behavioral digital simulation against an transistor-level analog implementation. I wrote a blogpost that demonstrates these capabilities: http://pepijndevos.nl/2021/04/10/simserver-tight-integration-with-decoupled-simulators.html