[WJW]

> You must

Don't want to be rude here, but version control is clearly not "required" in the strict sense. Plenty of software has been developed without it. Now I wouldn't want to work at a place without version control either, but it is as required for developing software as seat belts are required for driving a car. Less even, since at least for seat belts they are required by law.

[vbezhenar]

People manually control versions all the time. Ctrl + C, Ctrl + V on a project folder to make a version. I have doubts that someone developed any nontrivial software without that approach.