Most C libraries that are often called from python also have bindings for other languages and so at this point should be threadsafe, right? Also even GIL python

Most C libraries that are often called from python also have bindings for other languages and so at this point should be threadsafe, right? Also even GIL python supports threads so all these libraries will at least be reentrant safe already. For libraries that are reentrant but not thread safe, it should be sufficient to just add a global lock wrapping every call, which is pretty close to what the GIL was doing anyway. It seems to me that in many (most?) cases it should be relatively straightforward to make existing libraries work without the GIL (at the cost of parallelism). I guess the main issue will be for libraries that call back into the python runtime from the C side.