Is that any different to the standard Hummingbird? A FOAF works for a cycling mag and had one on test - he loved it, but it's ££££. For a utility/commuter (and what else do you need a small-wheeled folder for?) I don't really see the point.
For the same reason that people trick their Brommies up to the hilt, I guess. Think the Hum is about £3k, you could chuck a lot of titanium at a Brommie for that.
Hilarious.
Doesnt fold well, 0 servicablility.