I was fortunate to see America twice, once in the ‘70s and once in the ‘80s.
Great, great music.
They are IMO one of the few groups that gets it all right. Melody, harmony, catchy hooks and a distinctive sound. You KNOW when it’s America.
To me, there’s nothing they do ‘exceptional’. It’s just a total package coming together thing. There are far better players, singers etc. But they do it all at a level that just fits so well together.
For the genre, I don’t think Sister Golden Hair CAN be topped. And as a piece of music alongside the rest, it holds up well.