Using TypeScript enhanced a Ubisoft project involving 6-12 programmers and over 90,000 lines of code. TypeScript improved productivity by helping write code faster and easier, resolving problems more efficiently, finding issues earlier, reducing bugs and improving stability, lowering the learning curve for new members, and enabling easy collaboration to maintain high quality code. The presentation recommends immediately using TypeScript features like strictNullChecks and noImplicitAny to catch errors early, and emphasizes benefits like auto-completion and enabling design patterns.