I asked ChatGPT to give me Beethoven's Heroica (published 199 years ago, clearly in public domain) in ABC notation.

This is the "chilling effect", baked into a product.

As a side-note, if you go IMSLP, you will learn a) that the site is powered by mediawiki and CC, and b) you have to pay to download anything.

I hate copyrights. Copyrights limit creative people.