Works perfectly well, and empowers one to escape from it at a later date if necessary.
How is that at all relevant to the OP?
If your OS is shit, your environment is shit, at least your language doesn't have to be shit.
Because you are one of those rare HN creatures that enjoy using it, after using most consumer OS since the early 80's, and need it for coding/system administration.
I am one of those.
Because you want to have some agile tool. Are you trying to dance tango while wearing a medieval armor?