[vouwfietsman]

1: You are similarly able to confirm yourself when you ducktype in TS, regardless: once you've ducktyped once in TS you are then at least helped by the compiler. Again, this is really not a good argument at all.

2: This is a programming practice I never see and would seriously question if its necessary ever, let alone "commonly". I think you may have picked up bad practices from writing in dynamic languages. Please see this for a few example arguments against this practice: https://softwareengineering.stackexchange.com/questions/1873...

3: You are now debating that Rust has better typing than TS, which makes sense because Rust is made from the ground up to have extremely well done static type checking, whereas typescript has to comply with dynamic typing originating from JS. It follows trivially that Rust has the better design because it has more freedom to do what it wants. JS < TS < Rust