OFF: Concept Album-o-rama

[Bolts of Ungodly vision]

greetings yet again
After having spent the summer seeing Procol Harum play one of the first
rock suites, the Who perorming Quadrophenia and listening to a lot of
british rock in general, why is it so few American bands in the rock genre
can put out a real classsic concept album (excepting _Imaginos_ of course)?
is it a reflection of the music industry on our side of the Atlantic or am
i imagining things?
If you can think of a good concept LP by an American band from the
appropriet 70s era, let me know or  let the list know for that.

Going for his second BA,
Jason Scruton