...except needing docker and everything running it in a docker container entails over a simple CLI.
Also, it looks like they say "for god's sake don't pip install":
Please do not use python setup.py install or ``sudo pip install`. Those mode of operation might corrupt your operating system and is not supported by the Let’s Encrypt team! https://letsencrypt.readthedocs.org/en/latest/using.html#ins...
> python is on pretty much every platform in existence by default.
....except Windows? Which also doesn't support docker.