Wait. Wait. Backtrack for a second.
The year is 1974, and Linux, Mac, and Windows haven't been invented yet. There is no IDE, no SDK, and no documentation. Actually, there's no development environment at all. There are no APIs, either. Ruby, Python, Java, and friends are till 10 years or more from being invented. And yet, Gates wrote an interpreted language, on his own, in a week. Put differently, Gates wrote a language in a CAVE, with SCRAPS, in a WEEK.
It's easy to think that now we'd just Google it and scrape it together using copypasta if we really needed to. Hell, not only was there not Google, but there was no technical community to ask questions. Don't forget what he was really working with there.