Typescript and Rust. The focus has been on Typescript because i needed it, and I have to say with just JS I wouldn't have been able to develop large scale apps

Typescript and Rust. The focus has been on Typescript because i needed it, and I have to say with just JS I wouldn't have been able to develop large scale apps as I'm doing. Rust has been more curiosity driven, rather than by need as with TS. I have to say it is quite a steep learning curve for me, and I stil struggle too often to replicate something I write in JS/TS with Rust, while improving performance. The experience had me value a lot the nature of JS (single thread with event loop), because it makes it so easy to write code that feels multi threaded but retains the smaller complexity of single threaded code. I still have to properly learn how to achieve something similar in Rust. That said, I'm loving Rust, especially on the education aspect it's giving me a lot of insight on computer science theory.