Just as importantly - it was an all‑in‑one. I think a lot of people tend to forget that there were already plenty of earlier BASIC dialects (GW‑BASIC, Apple II BASIC, C64 BASIC, etc).

However QBASIC was likely the first freely available, all‑in‑one "batteries included" environment that came bundled with MS‑DOS 5 with a relatively friendly IDE that had built‑in help for every single command. GORILLA.BAS and NIBBLES.BAS were the gateway drugs for many future programmers.

Basic and Qbasic represent a part of computer culture that has been lost a little bit. It was the idea of making computers programmable to almost anyone without having to have a deep knowledge of how the system works.

I'm not saying we should go back to BASIC but that spirit of easy to build has been lost a little. Nowadays you need to pull in like 40 dependencies before things can get really moving. Yeah it is OK after that but the barrier to entry can be a little tough at times. This is the same complaint I have about multimedia on the web, Flash solved the issue in a terrible fashion but the core idea was great.