An interesting article, but I have to disagree with his conclusions about the effect on malware.

I'd say that mainstream Linux adoption would likely be dominated by 1 or 2 major distros, like Ubuntu. Any potential attack vector could be targeted at that distro's package management system, for instance, and be assured of some impact.

In addition, many distros share a common underlying base system (like Debian) - any child distros of a vulnerable system would also presumably share the same vulnerabilities.