It's dropped an octave or more and become hoarse. (Mind you, I'm a huge fan and wouldn't slag her.) I'm not all that fond of her early, yodeling soprano sound, either. To me, she sounded best during the mid-70s to early 80s. That's when she recorded my favorite albums: Blue, For the Roses, Court and Spark, Miles of Aisles, Hissing of Summer Lawns.

Cheers,
Michael