It won’t ever happen. For one- Starbucks is very expensive in Argentina. I know it’s not cheap practically anywhere in the world but in comparison to salaries in Argentina, even most professionals here don’t do the US style daily Starbucks coffee run, but see it as an occasional treat.
I don’t see the little old folks sitting in Starbucks the way they do in typical cafes for hours either.
Problem is rising rents and the typical (for now) confiterias with most people ordering just a relatively cheap espresso and 2 media lunas and lingering on those for ages are not very efficient. Bonafide and Martinez cost as much as Starbucks.