That's fair, I've not been exposed to people with RSIs that use these smaller keyboards. Most people I know with RSIs opt for the Microsoft ergonomic keyboards (The new ones are actually kind of cool looking!)

I'm glad it's working out for you, and I'll certainly sneer a little bit less at them in the future, but just using my anecdotal experience, a lot of RSIs make chording keys difficult, and most people who use small form factor keyboards say they do so because it makes their desk less cluttered. Maybe it's not just a fashion item... But for a certain segment, it certainly is.