That's what sh or bash is for, a least common denominator present on every machine. Sure, it is not the same as your home machine - but even with the right she

That's what sh or bash is for, a least common denominator present on every machine. Sure, it is not the same as your home machine - but even with the right shell, you customized config files woukd still be missing. So it is easier to get used to defaukt setup on defaut shell when managing many machines. (This is the reason I had to learn vi back in the day: sure, my machine has lovingly customized emacs.. But that old Sun one needs to debug? Vi only.)