Montevideo Rambla, Ciudad Vieja. When we arrived here, late 2009, it was rare to see even a single vehicle parked along this stretch of road.

Consumer credit comes to Uruguay! At least that’s one explanation.
Car prices have fallen recently. This may involve poor budgeting by people new to credit, buying cars for only *so much* a month. Perhaps they don’t think about fuel (2.5 times the cost in the USA), maintenance, and insurance. Then enough of them figure out they really can’t afford a car, and try to sell it.
At any rate, it’s distinctly more difficult to find a parking place in Montevideo than a few years ago, to the point that I usually don’t even try, and head to a parking garage instead.