1. How is it not a good argument? It's an actual historical fact which is not yet 5 years old rather than some intellectual exercise, you can hardly go better than "this stuff happened not 5 years ago".
2. The only "extreme" part here is the magnitude of the drift, it's a clear example and demonstration of the issue.
> How often is Samoa going to 'jump sides'?
How is that relevant to the problem specifically and clearly existing? Does it matter if your calendar is 24h off or 6h off? Your system is FUBAR either way.
> or another small dateline-neighbour country
The dateline isn't even relevant, are you somehow trying to win a prize in missing the point?
