I agree, one friend installed Debian because he saw that everyone recommended it, but he couldn't understand how to make VirtualBox work, even less when I explained the reason to him. He ended up returning to Windows because of more issues and he didn't like troubleshooting as much as I do lol
I'd say Linux Mint is pretty good too, Debian alone may be harder for new people who wants a system that just works out of the box.
I'd say updated documentation, there are some articles in their wiki/documentation that don't consider the default configuration for openSUSE, but an old one I think.