Surprisingly, this is a very controversial question. It plays a central part right now in a big lawsuit, where Verisign (they run the .com domain system) is suing XYZ.com (they run the .xyz domain system) and its CEO Daniel Negari for among other things talking badly about .com domains. Verisign specifically takes issue with the promotional video XYZ.com posted on their site where they say “With over 120 million .coms registered today, it’s impossible to find the domain name that you want.” Obviously it is not really “impossible,” but the question at hand is how true that statement really is. Is XYZ.com just exaggerating a little like many ads do or are they being disparaging?