We reached multiple digits addition and substraction with my oldest child through afterschooling in 1st grade. And so (European) taught him the Austrian method.

When they finally reached that last year (3rd grade!) he taught his class the Austrian method. His teacher was blown away.

I found the "standard method", when I was finally introduced to it, incredibly cumbersome, especially in cases like the one 22B shows above. The fact that it forces you to work first left to right then right to left is an issue.