Re: To some MSDOS was an major leap forward.
My first Unix* almost put me off for life. A Hitachi 2050 workstation (68010 based??) that booted up into some windowed Japanese UI. I had to learn the magic combination of characters that would allow me to communicate with it in something a bit like ASCII, and repeat it after every reboot. It was black magic I tell you.
* It was a HI-UX derivative, so probably not really Unix, in the POSIX compliant sense of the word.