TypeScript even took off after the earth had been salted by CoffeeScript. Many people were sceptical about TypeScript because they assumed it was as big of a bu

TypeScript even took off after the earth had been salted by CoffeeScript. Many people were sceptical about TypeScript because they assumed it was as big of a buy-in as CoffeeScript - rather than it just being JS with some (mostly) strictly-additive syntax, that you would have been able to strip out without risk had TS never taken off.