Spain have a far more youthful side, who can easily win again. France will come back, as will England. Argentina have few players coming through and many stars will have retired by the next tournament, even youthful Alvarez will be 30 next time out.
You said they have no chance, and maybe that's true for the next world cup, but Argentina is a factory of top players across all leagues, and the Argentina team has been to 7 World Cup finals, winning 3, and 6 of those were since 1978 (so out of 13 world cups, Argentina was a finalist in 6, and won half of those), and except 2002, Argentina always reaches knockout stages and beyond.