If I understand correctly, this would be very useful to debug application running on GUnicorn, Celery, etc. Apps that usually have several workers / processes / threads. Currently, it is very annoying to use pdb for that. The Debug Adapter Protocol works well for this case, but the only fully feature, and not buggy, client right now is VSCode (last I checked, the nvim implementation was still a bit buggy. Didn't try the Emacs one).

I really like debugging in a simple shell (à la gdb) so this would really be nice for my workflow.