Not sure if you're being sarcastic, but version control is one of the broadest categories to choose from for /v/programming. Programmers of all types (business software, games, web apps, whatever) should be familiar with this jargon perhaps more than any other. Familiarity with commits, branches, and repositories should be assumed in this sub.

I mean technically you can code without version control but it's an extraordinarily bad and risky idea. Not really an acceptable practice for any professional developer.

The trendiness of Mongo is a great illustration of the worst parts of the culture of this industry: brogrammers with zero attention spans constantly flocking from one "cool" new technology to another, never pausing long enough to question whether said technology is appropriate for the job, or reliable, or secure. I love web development (and a lot of aspects of its culture) but the herd mentality is going to result in some serious consequences one day.