This is another type of immature argument I also heard.

"You never had worked in a large project before with TS".

The belief that if the project is big, then you need to type things in order to scale is painful...

Well, is your architecture that you should waste the most of your time and continuos refactory around it, also the decoulpling strategies.

There are so many subjects you need to understand and to be aware of to have a scalable project... That reveals the lack of maturity in your thought.

I think you have never worked in a large Js Applications well structured before. I think you never worked in a big Rails application before. I think you never worked in a huge Python project before.

They are not explicit typing languages btw, just like Javascript.