I'd love to go all in on something like TypeScript but as long as it's backed by a runtime without true concurrency it can never be "the right tool for all jobs

I'd love to go all in on something like TypeScript but as long as it's backed by a runtime without true concurrency it can never be "the right tool for all jobs". Same problem with Python which I would also like to embrace but ultimately always have to complement with something that can do real multithreading.