> Such as?
You can search the web, but as an appetiser here you go: https://jfrog.com/blog/malware-civil-war-malicious-npm-packa...
> In what way?
Well, you can't bundle GPL licensed software with less restrictive one such as BSD, which is a big deal, that's why BSD and GNU/Linux are so separated in many ways. That's just one problem. It'c clear that all-or-nothing approach doesn't work in free and open source software world.