The Stones aged in the public space. Abba, on the other hand, disappeared for 25 years. So when they reappeared they seemed. with the exception of Agnetha. Old.

Three members of Abba were born in '45. Thus they were 30 when Abba broke in America in '75. Agnetha was born in '50. Three were Swedes. Anni-Frid was Norwegian

Agnetha released albums after Abba, but the only former member to have an American solo hit was Frida (Anni-Frid) with "I Know (There's Something Going On)"

"In the mid-80s, poodle rock band Europe became the first Swedish act after the demise of Abba to make a significant international impact..."--Carl Magnus Palm

Abba opened the door for a lot of other Swedish rock bands, from Roxette to the Cardigans. The producers, engineers and studio musicians who worked on Abba records, which were often made in Sweden, formed a pool of talent on which later Swedish bands could rely on as well.