> Too many really stop at the very basics.

As someone who knows slightly more than the basics, and enough to know about the advanced stuff that I don't know about, this is the correct place to stop.

I would much rather restructure my javascript than do typescript gymnastics to fit it into the type system.

I agree. The advanced stuff mostly exists in order to allow writing type annotations for JavaScript libraries that have APIs that are very dynamic.

If you're purely writing Typescript then you mostly don't need it.

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