I think it would be awesome for Typescript to introduce sync functions. So think of that as completely flipping the dialog on async/await to await by default:

    sync function x() {
        const taco = getTaco() // getTaco returns Promise<Taco>, but taco automatically resolves it in a sync function
        // Similarly, you can tell it to not wait
        const ptaco = nowait getTaco();
        // ptaco is a Promise<Taco>
        const taco2 = ptaco; // taco2 is a Taco because the ptaco symbol is treated like (await ptaco) without nowait
        // Also, since ptaco has already "awaited", future
        // access would be 0 delay as it's basically a resolved promise.
    }

Of course, similar to an async function, sync functions would also return a promise.

Probably a dumb idea but I would use it personally.