ccTLDs for the most part are a non-starter for numerous reasons - registrants in a particular ccTLD are ultimately at the mercy of the country / nation / territory to whom the ccTLD is assigned.
With that out of the way, .COM will remain dominent ... consider this, 800 prefix toll-free numbers, in North America, are still highly sought even now after 40+ years.
Yes, there is 888 and others like 877, 866, 855 (pending), but 800 is the prefix that most companies want because it's the prefix most people associate with toll-free numbers - likely the prefix they will try first when in doubt ... doesn't that sound familiar :lol:
Ron