I agree that Austrians are doing a great job with meetups, but as an excuse for others, from Graz to Vienna is like a 2 2-hour car drive... if someone from Vigo wants to come to Barcelona every month, that would be easier to do by plane...
We need 5 hours from our place to Barcelona... and we are not that far... 😃 And when you had an "offline" work it is not that easy to travel...
But, I agree that we should have at least 2-4 meetups like we had in Krakow...
Of course, it should be local that it's fair for everybody. Though there might be ways to balance the efforts of peoples will to participate.
Or, like you say, a larger number of international MeetUps, like Kraków.