@axbom right. So that's the biggest downside for me. NC makes the work risky to use, and thus it will not be used by projects and in contexts that you might presumably want the work to be used in.

SA solves this better in some ways. For example, no Big Corp would ever take an SA-licensed work and use it in an ad campaign or a product, film, etc, because they would have to release the whole thing under SA. Not gonna happen.

I totally get your "I don't want people to make books with my content"…