Obviously it doesn't strike you as odd as an American.
I'd say, .com is just the default. If you go location/topic specific, you go with another TLD.
To the 130 million (domainnamestat.com) domains, registered in the US, there are like 500 million domains, registered somewhere else. I couldn't find any numbers for how many of those are .com and how many aren't, but you cannot just ignore those. Just because most domains registered in the US are .com domains, doesn't make .com a US domain. That's a really egocentric point of view.
Then you didn't try a good one, yet. I can say the same about a steak that's cooked "wrong" or a "burger" where nobody ever knows what actually is in there because for all you know it can be hundreds of dead animals in a single burger patty.
It tastes terrible, if you cannot cook. That is true for every single meal.
This reminds me of an "Online HTML Minifier" website that analyzed the text and included affiliate links for random words within the text.
And they operated for years, when someone noticed links on their own website, they haven't added themselves and tried to figure out, how it happened, because nobody else had access to the website.
Migadu has unlimited domains and unlimited mailboxes per domain even on the smalles plan for 19 bucks. I don't see how 9.99 EUR PER mailbox is an alternative to that.
What does "user" mean with tutanota? If I want multiple custom domains, I need to go with the business account, which has a 1 GB storage limit and a 5 aliases limit. And then it is only for a single user. Does that mean, I cannot have independent login data for the multiple domains/mailboxes I create? Because then it is not close to a viable alternative to migadu.
I'd say, .com is just the default. If you go location/topic specific, you go with another TLD.
To the 130 million (domainnamestat.com) domains, registered in the US, there are like 500 million domains, registered somewhere else. I couldn't find any numbers for how many of those are .com and how many aren't, but you cannot just ignore those. Just because most domains registered in the US are .com domains, doesn't make .com a US domain. That's a really egocentric point of view.