I, perhaps, owe my career to DOS. As a kid, everyone relied on me to get their games, soundcard, and disk drives to work. Juggling IRQs HIMEM and CHKDSK. Soundblaster 16 forever!
Yep, I once made a good living getting drivers into high memory and making those menus in config.sys. Installing network drivers and Netware client. People were quite happy to see me when I arrived.
For some reason I thought DOS had already been opened.