Disclaimer: The content of this post does not reflect my current employer, or any of my clients at present. I've pulled details from my work history dating back about 20 years and stitched them into a more-or-less coherent narrative without being specific about any one company or client because, as unfashionable as it may be, I take my NDAs seriously. If you want to get into an IT genitalia measuring contest please close this tab, I don't care and have no interest.
Time was, back in the days of the home 8-bit computers, we were very limited in what we could do in more than one way. Without even a proper reset button or development tools other than the built-in BASIC interpreter if something went wrong there was really no way that you could debug it. If you happened to be hacking code in any serious way on the Commodore chances are you'd shelled out good money for a debugger or disassembler and had at least a couple of reference books nearby. If you were doing everything in BASIC then either you were growing your program a few lines at a time or using some code you got out of a magazine to do low level programming from inside of BASIC (an exercise fraught with frustration, let me tell you). Even then, if something went sideways it was difficult to figure out where you went wrong and fix it. The tools just weren't common at the time. All you could really do was turn off the machine, wait a few seconds, turn it back on, and give it another shot in the hope that the machine wouldn't lock up on you again.