Not only that, I found it much easier to create TUIs on DOS than on a UN*X system. I still have a hard time with curses. Zortech c on DOS had a small set of screen functions, disp_*().

These are enhanced printf(), scanf(), getc() type functions by adding cursor positioning on an 80x25 screen. Pretty basic but you could create nice applications with these basic functions in Zortech c.

Granted, on DOS the screen size did not change as it does in UN*X, making TUIs easier.

On the systems (minis) I worked on decades ago, TUIs were far easier then anything I have seen since.