It will be interesting to see Mojo, but in the meantime, JavaScript and TypeScript have some serious advantages for speed of iteration.
An often overlooked advantage of the JS/TS ecosystem is that it's easy to spin-up user interfaces of any level of complexity. When working with an API and JS in the browser, you can prototype and develop an UI over your LLM that can eventually go all the way to production.
Totally agree. Technically speaking it's also possible to do user interfaces in other languages via bindings but given that you can get responsive web apps out of the box with tailwind and other css frameworks, it feels like there's nothing approaching modern js frameworks in terms of speed of iteration when you're targeting multiple device types.