Thank you! My original use case was for running ffmpeg in directories with encodings that broke xargs, and later added the py/pyev flags which basically swapped

Thank you! My original use case was for running ffmpeg in directories with encodings that broke xargs, and later added the py/pyev flags which basically swapped subprocess.run() with exec()/print(eval()). I didn't really highlight it in the documentation but it can also run commands in parallel as multiple windows in a multiplexer so it's easier to checkup on their progress or interact with them.