If their intent is to continue to be a non-traditional company then it makes sense to NOT stick to a predictable/conventional .COM domain. Specific to their chosen domain name, while I'm not crazy about this .XYZ domain extension, I give google...er...I mean, Alphabet awesomely big props for choosing a very different domain extension. Even though one might consider these guys Da Man, I feel choosing an alternative domain extension is a mild manner of "sticking it to Da Man". Since so many decent combos for a .COM are taken, its like having all new real estate created from next-to-nothing. I for one greatly favor having an internet with myriad and varied domain extensions. Kudos to Alphabet/Google for at least this seemingly small gesture!!