That's hardly the standard. In 2020 you will write your code in Python using numpy and or numba and your done.
I process 4 concurrent HD video streams in Python in real time on a 4 core embedded device.
How much time is actually spent in the python runtime/interpreter? That python can glue some libraries together at a high level was never really in doubt.
How does that matter in any meaningful way ? Are you building real-world software or fretting about problems that you don't actually have ?
I'm a bit surprised to hear this, is this a common thing to do in the DSP world in 2020?