Have you tried the alternatives? They all suffer from various problems. e.g. I use fish but still write bash scripts for production systems - more so fish is p

Have you tried the alternatives? They all suffer from various problems. e.g. I use fish but still write bash scripts for production systems - more so fish is perhaps too safe in being too close to POSIX for the improvements to make a great difference (vs the pains of breaking compatibility). Powershell? You might as well write python or ruby at that rate.. What I mean to say is that while there has been a lot of initial inertia from the previous technologies that make it hard to change, it's also true that the new technologies have failed to make large enough gains to warrant the pains of changing - this is precisely the demise of Plan9: it's not that it wasn't better it just that it wasn't better enough to warrant the huge expense of replacing old, working systems.