Typescript is legitimately weird. You start off with Javascript, a language made to validate HTML forms. Then you implement a bytecode compiler so it's not unusably slow and buggy. Then you implement "frameworks" to try to make it create real applications across the insane platform that is the web browser. After twisting yourself into a pretzel just to avoid learning or making a new language, you finally invent another language on top of the first one just so you can have types. To top it all off, it takes up tons of memory and disk space. (I don't mention the slowness because I take it for granted, but 5x-10x slower than Go code is still worth considering)