I'm always amused when people say things like, "well, this material must suck because nobody uses it" or "brand X made a bike out of this material and it broke so it sucks". There are a lot of ways of utilising materials and it's the way that it's done that's more important than the material itself. As was previously mentioned, Mg has been used for high quality parts that seem to be holding up strong in both the bicycle and other industries. Likewise, there have been cases of the opposite. I will not speak to the quality of the Dogma but I would like to just point out that it is extremely narrowminded to discount a material without taking into consideration the manufacturing processes. I keep seeing people do this to everything from carbon fibre to titanium to aluminum and more.