The problem with JS and large applications was never the verbosity but that you can do horribly mistakes without getting any feedback until runtime since your mistakes are valid JS, they just mean something else than what you meant.
I.e. due to the lack of typing this will fly just fine:
I.e. due to the lack of typing this will fly just fine:
const calculateInterestingNumber = () <calculations goes here>;
let twiceAsInterestingNumber = 2 * calculateInterestingNumber; // (ooops, missing parenthesis)
... until runtime.
This was just the silliest contrived example.
In practice this - as you are fixing someone else's code and misplace/forget a set of parenthesis - ends up taking 30 minutes to figure out.