[wat10000]

Or maybe they have thought things through and they just don’t agree with your conclusion.

For people who choose a non-viral license, why not go straight to public domain? I see three reasons: 1. it avoids confusion and difficulty with countries that don’t recognize public domain. 2. it provides an explicit disclaimer of liability. 3. people like the requirement to credit the author or distributing organization.

1 wouldn’t be a problem with short copyright terms. 2 shouldn’t be either. I doubt someone would get anywhere trying to sue for damages caused by a defect in copyright-expired code. You’d lose 3 after 10 years but I’d guess open source authors see that as a nice-to-have rather than a hard requirement. The credit in proprietary software using non-viral open source is almost always buried in some “licenses” file nobody ever looks at anyway.