> жаль только на yблюдочном питоне
> contributed to the decision of dropping Go for Python:
> No need for concurrency or high speed here.
> Build problems: pty/terminal related Go libs don’t support as many architectures and operating systems while Python runs basically on every UNIX-like system.
> Batteries included: argparse, pty, locale, configparser, json, uuid, http. All of these excellent modules are used by asciinema and are part of Python’s standard library. Python stdlib’s quality and stability guarantees are order of magnitude higher than of unversioned Go libs from Github (I believe discrete releases ensure higher quality and more stability).

В общем, обычные отговорки неосилятора си.