TypeScript's static typing catches an entire category of bugs at compile time that JavaScript only surfaces at runtime, which is why most serious production teams have adopted it as the default choice for anything beyond small scripts.
The learning curve and added build step are real costs, but they're increasingly outweighed by the editor tooling, refactoring safety, and self-documenting nature that types provide — especially valuable as a codebase and team grow.
Cantonet Technologies defaults to TypeScript for production applications while still using plain JavaScript where its simplicity genuinely fits the task better.