[capi-sig]capi roadmap and refactoring goals

There is a roadmap for improving the C-API at https://pythoncapi.readthedocs.io/roadmap.html

From my reading of the information there, it seems there are a number of goals to the refactoring:

• allow compile-once c-extensions that would be binary compatible with more than one version/flavors of python
• hide python internals
  • which would make writing c-extensions less bug-prone (refcounting semantics, breaking refernence cycles)
  • which could unleash possible performance gains

Are these also goals?:

• allow introspection for JIT or AOT compilation of extension code as part of a larger unit, like Numba, Dask, or PyPy do
• enhance tooling like SIP, cython, pybind11,

What do you think? Is this an accurate summary of the goals? Matti