I would say Plaza Asturias and El Globo probably have a few years left but I doubt they will make it to the next decade. These old style Spanish / Argentine, restaurants with zero "onda" just aren't what younger people who can afford to eat out are interested in, unless they make major changes to the menu and waitstaff. The bow-tie, tray carrying grumpy old dude is not what people want to deal with when they pay to eat out. More modern waitstaff who you can ask questions to, that smile at you and seem to have some culinary knowledge is what people want now. That is why at most of the successful restaurants around Palermo the waitstaff is young Colombians who are warm and friendly and have zero attitude and make you feel welcome. The other places that are dying out fast are these old typical porteño bar-resto / confitería places, like 36 Billares, Confitería Ideal, etc, are like walking into a mausoleum!!