Ali Well, I was also thinking about this. The problem here is that you will lose all the other options for the third card.
Like having a MasterCard, a Maestro as Backup for stores without MasterCard support, and having a third MasterCard for your online purchases.
Just one (probably bad) example, but you would lose one card for all the different options just because you want a backup for going abroad.
And what if you lose all three? Of course, this is very unlikely if you put your third card in the hotel safe or something as backup, but what if you don't want to "need" to use your third card only as a backup?
I just think if bunq could give us the option to get cards worldwide, and fast, it could help.
You could use your third card for different stuff and you would have a better feeling if you just travel with bunq.