Nah, that's missing the point. While FLOSS products have a survivability advantage it's not like we see a high level of usage of diverse FLOSS productivity apps

Nah, that's missing the point. While FLOSS products have a survivability advantage it's not like we see a high level of usage of diverse FLOSS productivity apps across the user universe. The authors are more talking about why we don't see more varieties of software in the same category regularly emerging and seeing adoption. Other commenters have it right I think- network effects drive up the cost of not being on the dominant software. I also think that the security and privacy aspect plays a huge part too- it's one thing to install software sold by a retailer you trust in a non-networked computer, it's another to do so directly from a random website on an always on networked computer.